Rubinius 2.0.0dev readline error

gistfile1.txt

› rails console
An exception occurred running script/rails
    no such file to load -- readline/ext/readline (LoadError)

Backtrace:
       Rubinius::CodeLoader#load_error at kernel/common/codeloader.rb:337
  Rubinius::CodeLoader#resolve_require_path at kernel/common/codeloader.rb:324
   { } in Rubinius::CodeLoader#require at kernel/common/codeloader.rb:35
                  Rubinius.synchronize at kernel/bootstrap/rubinius.rb:133
          Rubinius::CodeLoader#require at kernel/common/codeloader.rb:34
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:148
                Kernel(Object)#require at kernel/common/kernel.rb:672
                    Object#__script__ at /Users/thomasmahoney/.rvm/rubies
                                         /rbx-2.0/lib/18/c-readline.rb:1
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:152
                Kernel(Object)#require at kernel/common/kernel.rb:672
                    Object#__script__ at /Users/thomasmahoney/.rvm/rubies
                                         /rbx-2.0/lib/readline.rb:1
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:152
                Kernel(Object)#require at kernel/common/kernel.rb:672
                    Object#__script__ at /Users/thomasmahoney/.rvm/rubies
                                         /rbx-2.0/lib/18/irb/completion.rb:10
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:152
                Kernel(Object)#require at kernel/common/kernel.rb:672
                    Object#__script__ at /Users/thomasmahoney/.rvm/gems
                                         /rbx-2.0@Todo/gems/railties-3.0.9/lib
                                         /rails/commands/console.rb:3
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:152
                Kernel(Object)#require at kernel/common/kernel.rb:672
                    Object#__script__ at /Users/thomasmahoney/.rvm/gems
                                         /rbx-2.0@Todo/gems/railties-3.0.9/lib
                                         /rails/commands.rb:20
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:152
                Kernel(Object)#require at kernel/common/kernel.rb:672
                     Object#__script__ at script/rails:6
      Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:65
      Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:107
               Rubinius::Loader#script at kernel/loader.rb:626
                 Rubinius::Loader#main at kernel/loader.rb:780