Rakefile in ruby_parser-3.0.0.a8 vs Rakefile in ruby_parser-3.0.0.a9

@@ -169,9 +169,14 @@
     lines = src[0..ss.pos].split(/\n/)
     abort "on #{file}:#{lines.size}"
   end
 end
 
+task :debug_ruby do
+  file = ENV["F"] || ENV["FILE"]
+  sh "ruby19 -cwy #{file} 2>&1 | ./yuck.rb"
+end
+
 task :extract => :isolate do
   ENV["V"] ||= "19"
   Rake.application[:parser].invoke # this way we can have DEBUG set
 
   file = ENV["F"] || ENV["FILE"]