gistfile1.builder

# workaround for bug in cucumber 0.8.1
module Cucumber
  module Ast
    module FeatureElement

      def source_tag_names
        (@tags.tag_names + (@feature ? @feature.source_tag_names : [])).to_a.uniq
      end

    end
  end
end

gistfile2.txt

/home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/ast/feature_element.rb:65:in `source_tag_names': undefined method `uniq' for #<Java::JavaUtil::ArrayList:0x7ba614a> (NoMethodError)
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/ast/feature_element.rb:61:in `accept_hook?'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/language_support/language_methods.rb:61:in `hooks_for'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/language_support/language_methods.rb:61:in `select'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/language_support/language_methods.rb:61:in `hooks_for'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/language_support/language_methods.rb:105:in `execute_before'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/language_support/language_methods.rb:19:in `before'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/step_mother.rb:343:in `before'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/step_mother.rb:342:in `each'
	 ... 31 levels...
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/cli/main.rb:64:in `execute!'
	from /home/qaa/.bundle/jruby/1.8/gems/cucumber-0.8.1/lib/cucumber/cli/main.rb:25:in `execute'