Fixed that the debugger wouldn't go into IRB mode because of left-over ARGVs [DHH]

railties/CHANGELOG

 *Edge*
 
+* Fixed that the debugger wouldn't go into IRB mode because of left-over ARGVs [DHH]
+
 * I18n support for plugins.  #2325 [Antonio Tapiador, Sven Fuchs]
 
 * Ruby 1.9: use UTF-8 for default internal and external encodings.  [Jeremy Kemper]

railties/lib/rails/rack/debugger.rb

@@ -4,6 +4,8 @@ class Debugger
       def initialize(app)
         @app = app
 
+        ARGV.clear # clear ARGV so that script/server options aren't passed to IRB
+
         require_library_or_gem 'ruby-debug'
         ::Debugger.start
         ::Debugger.settings[:autoeval] = true if ::Debugger.respond_to?(:settings)