Rakefile in ffi-icu-0.1.3 vs Rakefile in ffi-icu-0.1.4

@@ -5,9 +5,10 @@
 Bundler::GemHelper.install_tasks
 
 require 'rspec/core/rake_task'
 RSpec::Core::RakeTask.new(:spec) do |spec|
   spec.pattern = 'spec/**/*_spec.rb'
+  spec.rspec_opts = '--backtrace'
 end
 
 RSpec::Core::RakeTask.new(:rcov) do |spec|
   spec.pattern = 'spec/**/*_spec.rb'
   spec.rcov = true