test.log in groonga-client-model-0.9.8

- old
+ new
@@ -2044,5 +2044,461 @@
 Started PATCH "/posts/1" for 127.0.0.1 at 2016-12-27 15:17:51 +0900
 Processing by PostsController#update as HTML
   Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}, "id"=>"1"}
 Redirected to http://www.example.com/posts/1
 Completed 302 Found in 30ms
+------------------------------------------
+PostsControllerTest: test_should_get_index
+------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+----------------------------------------
+PostsControllerTest: test_should_get_new
+----------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+--------------------------------------------
+PostsControllerTest: test_should_create_post
+--------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+-----------------------------------------
+PostsControllerTest: test_should_get_edit
+-----------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+------------------------------------------
+PostsControllerTest: test_should_show_post
+------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+---------------------------------------------
+PostsControllerTest: test_should_destroy_post
+---------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+--------------------------------------------
+PostsControllerTest: test_should_update_post
+--------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+----------------------
+PostTest: test_.create
+----------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `ensure in instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+----------------------
+PostTest: test_.create
+----------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:181:in `method_missing'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema.rb:21:in `block in initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema.rb:20:in `initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:33:in `new'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:33:in `schema'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:41:in `columns'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:52:in `define_attributes'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:141:in `initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:107:in `new'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:107:in `create'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:7:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:108:in `create'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:7:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:65:in `block in create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client_opener.rb:21:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:64:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:139:in `create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/modelizable.rb:20:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:28:in `response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:134:in `each'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `first'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `find'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:8:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:181:in `method_missing'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/test/groonga-server-runner.rb:63:in `block in stop'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:49:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/test/groonga-server-runner.rb:62:in `stop'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:29:in `teardown_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:31:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:242:in `block in simple'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_teardown_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:45:in `after_teardown'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:112:in `block (4 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:111:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:110:in `each'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:110:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+--------------------------------------------
+PostsControllerTest: test_should_update_post
+--------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:160:in `save!'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/configuration.rb:18:in `block in initialize'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/evaluation.rb:15:in `create'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:12:in `block in result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `tap'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory.rb:42:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:29:in `block in run'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:28:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/controllers/posts_controller_test.rb:7:in `block in <class:PostsControllerTest>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Started PATCH "/posts/1" for 127.0.0.1 at 2017-01-27 10:24:55 +0900
+Processing by PostsController#update as HTML
+  Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}, "id"=>"1"}
+  [1m[35mselect (28.5ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mload (0.9ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"_id\":1,\"body\":\"World\",\"title\":\"Hello\"}\n]"[0m
+Redirected to http://www.example.com/posts/1
+Completed 302 Found in 38ms (Groonga: 29.4ms)
+  [1m[36mshutdown (0.9ms)[0m  [1m[35mshutdown[0m
+----------------------------------------
+PostsControllerTest: test_should_get_new
+----------------------------------------
+  [1m[36mtable_create (2.5ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.4ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/new" for 127.0.0.1 at 2017-01-27 10:24:55 +0900
+Processing by PostsController#new as HTML
+  Rendering posts/new.html.erb within layouts/application
+  Rendered posts/_form.html.erb (26.2ms)
+  Rendered posts/new.html.erb within layouts/application (30.2ms)
+Completed 200 OK in 289ms (Views: 286.8ms | Groonga: 0.0ms)
+  [1m[36mshutdown (1.0ms)[0m  [1m[35mshutdown[0m
+---------------------------------------------
+PostsControllerTest: test_should_destroy_post
+---------------------------------------------
+  [1m[36mtable_create (2.6ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.2ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.8ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+  [1m[35mselect (2.4ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+Started DELETE "/posts/1" for 127.0.0.1 at 2017-01-27 10:24:56 +0900
+Processing by PostsController#destroy as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (31.4ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mdelete (1.0ms)[0m  [1m[31mdelete --filter "_id == 1" --table "posts"[0m
+Redirected to http://www.example.com/posts
+Completed 302 Found in 35ms (Groonga: 32.4ms)
+  [1m[35mselect (0.8ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+  [1m[36mshutdown (0.7ms)[0m  [1m[35mshutdown[0m
+------------------------------------------
+PostsControllerTest: test_should_show_post
+------------------------------------------
+  [1m[36mtable_create (2.7ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.5ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.4ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/1" for 127.0.0.1 at 2017-01-27 10:24:56 +0900
+Processing by PostsController#show as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (57.9ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  Rendering posts/show.html.erb within layouts/application
+  Rendered posts/show.html.erb within layouts/application (0.5ms)
+Completed 200 OK in 62ms (Views: 2.1ms | Groonga: 57.9ms)
+  [1m[36mshutdown (0.9ms)[0m  [1m[35mshutdown[0m
+-----------------------------------------
+PostsControllerTest: test_should_get_edit
+-----------------------------------------
+  [1m[36mtable_create (2.6ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/1/edit" for 127.0.0.1 at 2017-01-27 10:24:56 +0900
+Processing by PostsController#edit as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (57.6ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  Rendering posts/edit.html.erb within layouts/application
+  Rendered posts/_form.html.erb (1.3ms)
+  Rendered posts/edit.html.erb within layouts/application (2.1ms)
+Completed 200 OK in 63ms (Views: 3.6ms | Groonga: 57.6ms)
+  [1m[36mshutdown (0.9ms)[0m  [1m[35mshutdown[0m
+--------------------------------------------
+PostsControllerTest: test_should_create_post
+--------------------------------------------
+  [1m[36mtable_create (2.7ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.8ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+  [1m[35mselect (2.5ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+Started POST "/posts" for 127.0.0.1 at 2017-01-27 10:24:56 +0900
+Processing by PostsController#create as HTML
+  Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}}
+  [1m[36mload (2.9ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Redirected to http://www.example.com/posts/2
+Completed 302 Found in 6ms (Groonga: 2.9ms)
+  [1m[35mselect (2.4ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+  [1m[35mselect (2.7ms)[0m  [1m[34mselect --limit "1" --match_columns "body" --sort_keys "-_id" --sortby "-_id" --table "posts"[0m
+  [1m[36mshutdown (2.0ms)[0m  [1m[35mshutdown[0m
+------------------------------------------
+PostsControllerTest: test_should_get_index
+------------------------------------------
+  [1m[36mtable_create (2.7ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.6ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts" for 127.0.0.1 at 2017-01-27 10:24:56 +0900
+Processing by PostsController#index as HTML
+  Rendering posts/index.html.erb within layouts/application
+  [1m[35mselect (2.8ms)[0m  [1m[34mselect --limit "-1" --match_columns "body" --table "posts"[0m
+  Rendered posts/index.html.erb within layouts/application (5.9ms)
+Completed 200 OK in 14ms (Views: 8.8ms | Groonga: 2.8ms)
+  [1m[36mshutdown (2.1ms)[0m  [1m[35mshutdown[0m
+--------------------------------------------
+PostsControllerTest: test_should_create_post
+--------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:181:in `method_missing'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema.rb:21:in `block in initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema.rb:20:in `initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:33:in `new'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:33:in `schema'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:41:in `columns'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:52:in `define_attributes'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:141:in `initialize'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator/new_constructor.rb:9:in `new'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator/new_constructor.rb:9:in `new'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator.rb:14:in `send'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator.rb:10:in `method_missing'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator/invocation_tracker.rb:11:in `method_missing'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator.rb:14:in `send'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/decorator.rb:10:in `method_missing'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/configuration.rb:19:in `block in initialize'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/attribute_assigner.rb:48:in `instance_exec'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/attribute_assigner.rb:48:in `build_class_instance'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/attribute_assigner.rb:13:in `object'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/evaluation.rb:12:in `object'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory.rb:42:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:29:in `block in run'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:28:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/controllers/posts_controller_test.rb:7:in `block in <class:PostsControllerTest>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:160:in `save!'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/configuration.rb:18:in `block in initialize'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/evaluation.rb:15:in `create'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:12:in `block in result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `tap'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory.rb:42:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:29:in `block in run'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:28:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/controllers/posts_controller_test.rb:7:in `block in <class:PostsControllerTest>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:65:in `block in create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client_opener.rb:21:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:64:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:139:in `create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/modelizable.rb:20:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:28:in `response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:56:in `count'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/controllers/posts_controller_test.rb:21:in `block in <class:PostsControllerTest>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/assertions.rb:67:in `eval'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/assertions.rb:67:in `block (2 levels) in assert_difference'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/assertions.rb:69:in `map'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/assertions.rb:69:in `assert_difference'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/controllers/posts_controller_test.rb:21:in `block in <class:PostsControllerTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Started POST "/posts" for 127.0.0.1 at 2017-01-27 10:26:04 +0900
+Processing by PostsController#create as HTML
+  Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}}
+  [1m[36mload (1.2ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Redirected to http://www.example.com/posts/2
+Completed 302 Found in 9ms (Groonga: 1.2ms)
+  [1m[35mselect (0.9ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+  [1m[35mselect (0.9ms)[0m  [1m[34mselect --limit "1" --match_columns "body" --sort_keys "-_id" --sortby "-_id" --table "posts"[0m
+  [1m[36mshutdown (0.7ms)[0m  [1m[35mshutdown[0m
+---------------------------------------------
+PostsControllerTest: test_should_destroy_post
+---------------------------------------------
+  [1m[36mtable_create (2.5ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.1ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.4ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+  [1m[35mselect (2.4ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+Started DELETE "/posts/1" for 127.0.0.1 at 2017-01-27 10:26:04 +0900
+Processing by PostsController#destroy as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (56.1ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mdelete (1.1ms)[0m  [1m[31mdelete --filter "_id == 1" --table "posts"[0m
+Redirected to http://www.example.com/posts
+Completed 302 Found in 59ms (Groonga: 57.2ms)
+  [1m[35mselect (0.8ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+  [1m[36mshutdown (0.7ms)[0m  [1m[35mshutdown[0m
+----------------------------------------
+PostsControllerTest: test_should_get_new
+----------------------------------------
+  [1m[36mtable_create (2.5ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (2.4ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/new" for 127.0.0.1 at 2017-01-27 10:26:04 +0900
+Processing by PostsController#new as HTML
+  Rendering posts/new.html.erb within layouts/application
+  Rendered posts/_form.html.erb (9.8ms)
+  Rendered posts/new.html.erb within layouts/application (11.6ms)
+Completed 200 OK in 101ms (Views: 99.8ms | Groonga: 0.0ms)
+  [1m[36mshutdown (1.0ms)[0m  [1m[35mshutdown[0m
+------------------------------------------
+PostsControllerTest: test_should_show_post
+------------------------------------------
+  [1m[36mtable_create (2.4ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.1ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.0ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (1.9ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (2.9ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.4ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/1" for 127.0.0.1 at 2017-01-27 10:26:05 +0900
+Processing by PostsController#show as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (56.9ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  Rendering posts/show.html.erb within layouts/application
+  Rendered posts/show.html.erb within layouts/application (0.5ms)
+Completed 200 OK in 61ms (Views: 2.1ms | Groonga: 56.9ms)
+  [1m[36mshutdown (0.9ms)[0m  [1m[35mshutdown[0m
+--------------------------------------------
+PostsControllerTest: test_should_update_post
+--------------------------------------------
+  [1m[36mtable_create (1.0ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (0.9ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (1.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (1.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (1.8ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (1.5ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started PATCH "/posts/1" for 127.0.0.1 at 2017-01-27 10:26:05 +0900
+Processing by PostsController#update as HTML
+  Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}, "id"=>"1"}
+  [1m[35mselect (28.9ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mload (0.8ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"_id\":1,\"body\":\"World\",\"title\":\"Hello\"}\n]"[0m
+Redirected to http://www.example.com/posts/1
+Completed 302 Found in 31ms (Groonga: 29.7ms)
+  [1m[36mshutdown (0.7ms)[0m  [1m[35mshutdown[0m
+------------------------------------------
+PostsControllerTest: test_should_get_index
+------------------------------------------
+  [1m[36mtable_create (2.8ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.2ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.4ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts" for 127.0.0.1 at 2017-01-27 10:26:05 +0900
+Processing by PostsController#index as HTML
+  Rendering posts/index.html.erb within layouts/application
+  [1m[35mselect (2.8ms)[0m  [1m[34mselect --limit "-1" --match_columns "body" --table "posts"[0m
+  Rendered posts/index.html.erb within layouts/application (5.8ms)
+Completed 200 OK in 14ms (Views: 8.9ms | Groonga: 2.8ms)
+  [1m[36mshutdown (2.2ms)[0m  [1m[35mshutdown[0m
+-----------------------------------------
+PostsControllerTest: test_should_get_edit
+-----------------------------------------
+  [1m[36mtable_create (2.9ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.4ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/1/edit" for 127.0.0.1 at 2017-01-27 10:26:05 +0900
+Processing by PostsController#edit as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (57.0ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  Rendering posts/edit.html.erb within layouts/application
+  Rendered posts/_form.html.erb (1.3ms)
+  Rendered posts/edit.html.erb within layouts/application (2.0ms)
+Completed 200 OK in 63ms (Views: 3.6ms | Groonga: 57.0ms)
+  [1m[36mshutdown (0.9ms)[0m  [1m[35mshutdown[0m
+----------------------------
+PostTest: test_.create(Hash)
+----------------------------
+  [1m[36mtable_create (2.5ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (2.6ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\"}\n]"[0m
+  [1m[35mselect (56.1ms)[0m  [1m[34mselect --filter "_id == 1" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mshutdown (0.9ms)[0m  [1m[35mshutdown[0m
+------------------------------
+PostTest: test_.create([Hash])
+------------------------------
+  [1m[36mtable_create (2.6ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.0ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.7ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mshutdown (1.9ms)[0m  [1m[35mshutdown[0m
+----------------------------
+PostTest: test_.create(Hash)
+----------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:181:in `method_missing'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema.rb:21:in `block in initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema.rb:20:in `initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:33:in `new'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:33:in `schema'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:41:in `columns'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:52:in `define_attributes'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:141:in `initialize'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:107:in `new'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:107:in `create'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:7:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:108:in `create'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:7:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:65:in `block in create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client_opener.rb:21:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:64:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:139:in `create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/modelizable.rb:20:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:28:in `response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:134:in `each'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `first'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `find'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:8:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:181:in `method_missing'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/test/groonga-server-runner.rb:63:in `block in stop'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:49:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/test/groonga-server-runner.rb:62:in `stop'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:29:in `teardown_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:31:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:242:in `block in simple'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_teardown_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:45:in `after_teardown'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:112:in `block (4 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:111:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:110:in `each'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:110:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+------------------------------
+PostTest: test_.create([Hash])
+------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:108:in `create'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:104:in `block in create'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:103:in `collect'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:103:in `create'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:12:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:108:in `create'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:104:in `block in create'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:103:in `collect'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:103:in `create'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:12:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:65:in `block in create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client_opener.rb:21:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:64:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:139:in `create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/modelizable.rb:20:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:28:in `response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:134:in `each'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `first'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `find'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:14:in `block (2 levels) in <class:PostTest>'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:14:in `collect'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:14:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:65:in `block in create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client_opener.rb:21:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:64:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:139:in `create_response'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/modelizable.rb:20:in `create_response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/base.rb:28:in `response'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/request/select.rb:134:in `each'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `first'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:64:in `find'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:14:in `block (2 levels) in <class:PostTest>'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:14:in `collect'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/models/post_test.rb:14:in `block in <class:PostTest>'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:107:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:181:in `method_missing'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/test/groonga-server-runner.rb:63:in `block in stop'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:49:in `open_client'", "/home/kou/work/ruby/groonga-client/lib/groonga/client/test/groonga-server-runner.rb:62:in `stop'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:29:in `teardown_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:31:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:242:in `block in simple'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:456:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_teardown_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:45:in `after_teardown'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:112:in `block (4 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:111:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:110:in `each'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:110:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+--------------------------------------------
+PostsControllerTest: test_should_update_post
+--------------------------------------------
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:32:in `block (2 levels) in load'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:155:in `on_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:278:in `process_command'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:253:in `parse_line'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:216:in `block (2 levels) in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `loop'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:212:in `block in consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `catch'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:211:in `consume_buffer'", "/var/lib/gems/2.3.0/gems/groonga-command-parser-1.0.7/lib/groonga/command/parser.rb:132:in `<<'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:36:in `block (3 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `each_line'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:35:in `block (2 levels) in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:34:in `block in load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/schema_loader.rb:29:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/groonga_server_runner.rb:40:in `run'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test/fixture.rb:24:in `setup_groonga'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/test_helper.rb:27:in `block (2 levels) in <module:TestHelper>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Could not log "groonga.groonga_client_model" event. NoMethodError: undefined method `+' for nil:NilClass ["/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/log_subscriber.rb:47:in `groonga'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/subscriber.rb:95:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/log_subscriber.rb:83:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:102:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `block in finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/fanout.rb:46:in `finish'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:42:in `finish_with_state'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications/instrumenter.rb:27:in `instrument'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:164:in `instrument'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:46:in `execute_command'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:176:in `execute'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:164:in `load'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:261:in `block in upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:35:in `block in open'", "/home/kou/work/ruby/groonga-client/lib/groonga/client.rb:79:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:33:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/client.rb:23:in `open'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:257:in `upsert_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:245:in `block in upsert'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_create_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:244:in `upsert'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:216:in `save_raw'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:155:in `block in save'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:97:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_save_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:154:in `save'", "/home/kou/work/ruby/groonga-client-model/lib/groonga_client_model/record.rb:160:in `save!'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/configuration.rb:18:in `block in initialize'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/evaluation.rb:15:in `create'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:12:in `block in result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `tap'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy/create.rb:9:in `result'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory.rb:42:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:29:in `block in run'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/notifications.rb:166:in `instrument'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/factory_runner.rb:28:in `run'", "/var/lib/gems/2.3.0/gems/factory_girl-4.8.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method'", "/home/kou/work/ruby/groonga-client-model/test/apps/rails5/test/controllers/posts_controller_test.rb:7:in `block in <class:PostsControllerTest>'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `instance_exec'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:396:in `block in make_lambda'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:169:in `block (2 levels) in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:547:in `block (2 levels) in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `catch'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:546:in `block in default_terminator'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:170:in `block in halting'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `block in call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `each'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:454:in `call'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:101:in `__run_callbacks__'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:750:in `_run_setup_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/callbacks.rb:90:in `run_callbacks'", "/var/lib/gems/2.3.0/gems/activesupport-5.0.1/lib/active_support/testing/setup_and_teardown.rb:41:in `before_setup'", "/var/lib/gems/2.3.0/gems/actionpack-5.0.1/lib/action_dispatch/testing/integration.rb:401:in `before_setup'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_help.rb:40:in `before_setup'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:105:in `block (3 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:204:in `capture_exceptions'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:104:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:255:in `time_it'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:103:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:275:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest/test.rb:102:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:799:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:322:in `run_one_method'", "/usr/lib/ruby/vendor_ruby/minitest.rb:310:in `block (2 levels) in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `each'", "/usr/lib/ruby/vendor_ruby/minitest.rb:309:in `block in run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:348:in `on_signal'", "/usr/lib/ruby/vendor_ruby/minitest.rb:335:in `with_info_handler'", "/usr/lib/ruby/vendor_ruby/minitest.rb:308:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/line_filtering.rb:11:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `block in __run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `map'", "/usr/lib/ruby/vendor_ruby/minitest.rb:158:in `__run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:135:in `run'", "/var/lib/gems/2.3.0/gems/railties-5.0.1/lib/rails/test_unit/minitest_plugin.rb:73:in `run'", "/usr/lib/ruby/vendor_ruby/minitest.rb:62:in `block in autorun'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `fork'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:161:in `serve'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in `block in run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `loop'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in `run'", "/var/lib/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in `<top (required)>'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'", "-e:1:in `<main>'"]
+Started PATCH "/posts/1" for 127.0.0.1 at 2017-01-27 10:26:26 +0900
+Processing by PostsController#update as HTML
+  Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}, "id"=>"1"}
+  [1m[35mselect (26.9ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mload (0.9ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"_id\":1,\"body\":\"World\",\"title\":\"Hello\"}\n]"[0m
+Redirected to http://www.example.com/posts/1
+Completed 302 Found in 36ms (Groonga: 27.8ms)
+  [1m[36mshutdown (0.8ms)[0m  [1m[35mshutdown[0m
+----------------------------------------
+PostsControllerTest: test_should_get_new
+----------------------------------------
+  [1m[36mtable_create (2.4ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.7ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.6ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/new" for 127.0.0.1 at 2017-01-27 10:26:26 +0900
+Processing by PostsController#new as HTML
+  Rendering posts/new.html.erb within layouts/application
+  Rendered posts/_form.html.erb (17.1ms)
+  Rendered posts/new.html.erb within layouts/application (20.8ms)
+Completed 200 OK in 118ms (Views: 116.6ms | Groonga: 0.0ms)
+  [1m[36mshutdown (1.0ms)[0m  [1m[35mshutdown[0m
+---------------------------------------------
+PostsControllerTest: test_should_destroy_post
+---------------------------------------------
+  [1m[36mtable_create (2.7ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.2ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.9ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+  [1m[35mselect (2.4ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+Started DELETE "/posts/1" for 127.0.0.1 at 2017-01-27 10:26:26 +0900
+Processing by PostsController#destroy as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (59.2ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  [1m[36mdelete (1.1ms)[0m  [1m[31mdelete --filter "_id == 1" --table "posts"[0m
+Redirected to http://www.example.com/posts
+Completed 302 Found in 63ms (Groonga: 60.2ms)
+  [1m[35mselect (0.7ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+  [1m[36mshutdown (0.7ms)[0m  [1m[35mshutdown[0m
+------------------------------------------
+PostsControllerTest: test_should_get_index
+------------------------------------------
+  [1m[36mtable_create (2.9ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.6ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.2ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.8ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts" for 127.0.0.1 at 2017-01-27 10:26:26 +0900
+Processing by PostsController#index as HTML
+  Rendering posts/index.html.erb within layouts/application
+  [1m[35mselect (2.8ms)[0m  [1m[34mselect --limit "-1" --match_columns "body" --table "posts"[0m
+  Rendered posts/index.html.erb within layouts/application (6.2ms)
+Completed 200 OK in 14ms (Views: 9.4ms | Groonga: 2.8ms)
+  [1m[36mshutdown (2.1ms)[0m  [1m[35mshutdown[0m
+--------------------------------------------
+PostsControllerTest: test_should_create_post
+--------------------------------------------
+  [1m[36mtable_create (2.7ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.4ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.5ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (4.4ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+  [1m[35mselect (3.3ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+Started POST "/posts" for 127.0.0.1 at 2017-01-27 10:26:27 +0900
+Processing by PostsController#create as HTML
+  Parameters: {"post"=>{"body"=>"World", "title"=>"Hello"}}
+  [1m[36mload (3.1ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Redirected to http://www.example.com/posts/2
+Completed 302 Found in 6ms (Groonga: 3.1ms)
+  [1m[35mselect (2.4ms)[0m  [1m[34mselect --limit "0" --match_columns "body" --output_columns "_id" --table "posts"[0m
+  [1m[35mselect (2.7ms)[0m  [1m[34mselect --limit "1" --match_columns "body" --sort_keys "-_id" --sortby "-_id" --table "posts"[0m
+  [1m[36mshutdown (2.1ms)[0m  [1m[35mshutdown[0m
+-----------------------------------------
+PostsControllerTest: test_should_get_edit
+-----------------------------------------
+  [1m[36mtable_create (2.6ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (2.2ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (2.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (2.3ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (3.3ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (3.7ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/1/edit" for 127.0.0.1 at 2017-01-27 10:26:27 +0900
+Processing by PostsController#edit as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (60.1ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  Rendering posts/edit.html.erb within layouts/application
+  Rendered posts/_form.html.erb (1.3ms)
+  Rendered posts/edit.html.erb within layouts/application (2.0ms)
+Completed 200 OK in 66ms (Views: 3.5ms | Groonga: 60.1ms)
+  [1m[36mshutdown (0.8ms)[0m  [1m[35mshutdown[0m
+------------------------------------------
+PostsControllerTest: test_should_show_post
+------------------------------------------
+  [1m[36mtable_create (1.3ms)[0m  [1m[35mtable_create --flags "TABLE_NO_KEY" --name "posts"[0m
+  [1m[36mcolumn_create (1.1ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "title" --table "posts" --type "ShortText"[0m
+  [1m[36mcolumn_create (1.0ms)[0m  [1m[35mcolumn_create --flags "COLUMN_SCALAR" --name "body" --table "posts" --type "Text"[0m
+  [1m[36mtable_create (1.0ms)[0m  [1m[35mtable_create --default_tokenizer "TokenBigram" --flags "TABLE_PAT_KEY" --key_type "ShortText" --name "terms" --normalizer "NormalizerAuto"[0m
+  [1m[36mcolumn_create (1.4ms)[0m  [1m[35mcolumn_create --flags "COLUMN_INDEX|WITH_POSITION" --name "posts_body" --source "body" --table "terms" --type "posts"[0m
+  [1m[36mload (1.6ms)[0m  [1m[32mload --command_version "3" --output_ids "yes" --table "posts" --values "[\n{\"title\":\"Hello\",\"body\":\"World\"}\n]"[0m
+Started GET "/posts/1" for 127.0.0.1 at 2017-01-27 10:26:27 +0900
+Processing by PostsController#show as HTML
+  Parameters: {"id"=>"1"}
+  [1m[35mselect (45.5ms)[0m  [1m[34mselect --filter "_id == \"1\"" --limit "1" --match_columns "body" --table "posts"[0m
+  Rendering posts/show.html.erb within layouts/application
+  Rendered posts/show.html.erb within layouts/application (0.5ms)
+Completed 200 OK in 49ms (Views: 2.3ms | Groonga: 45.5ms)
+  [1m[36mshutdown (0.7ms)[0m  [1m[35mshutdown[0m