Mixed versions

gistfile1.txt

An exception occurred running boo.rb:

    no such file to load -- active_support/core_ext/class/inheritable_attributes (LoadError)

Backtrace:

            Rubinius::CodeLoader#load_error at kernel/common/code_loader.rb:441
  Rubinius::CodeLoader#resolve_require_path at kernel/common/code_loader.rb:425
        { } in Rubinius::CodeLoader#require at kernel/common/code_loader.rb:103
                       Rubinius.synchronize at kernel/bootstrap/rubinius.rb:137
               Rubinius::CodeLoader#require at kernel/common/code_loader.rb:102
               Rubinius::CodeLoader.require at kernel/common/code_loader.rb:237
                     Kernel(Object)#require at kernel/common/kernel.rb:705
                         Object#__script__ at /Users/jclark/.rbenv/versions/rbx-2.2.10/gems/gems/activemodel-3.0.20
                                              /lib/active_model/attribute_methods.rb:2
               Rubinius::CodeLoader.require at kernel/common/code_loader.rb:243
                           Autoload#resolve at kernel/common/autoload.rb:55
          { } in Object(Module)#__script__ at /Users/jclark/.rbenv/versions/rbx-2.2.10/gems/gems
                                              /activerecord-4.2.0.beta1/lib/active_record/attribute_methods.rb:9
          { } in Object(Module)#__script__ at /Users/jclark/.rbenv/versions/rbx-2.2.10/gems/gems
                                              /activerecord-4.2.0.beta1/lib/active_record/attribute_methods.rb:7
                         Object#__script__ at /Users/jclark/.rbenv/versions/rbx-2.2.10/gems/gems
                                              /activerecord-4.2.0.beta1/lib/active_record/attribute_methods.rb:5
               Rubinius::CodeLoader.require at kernel/common/code_loader.rb:243
                           Autoload#resolve at kernel/common/autoload.rb:55
                              Autoload#call at kernel/common/autoload.rb:43
                 Rubinius.open_module_under at kernel/delta/rubinius.rb:63
                       Rubinius.open_module at kernel/delta/rubinius.rb:86
          { } in Object(Module)#__script__ at /Users/jclark/.rbenv/versions/rbx-2.2.10/gems/gems
                                              /activerecord-4.2.0.beta1/lib/active_record.rb:103
                         Object#__script__ at /Users/jclark/.rbenv/versions/rbx-2.2.10/gems/gems
                                              /activerecord-4.2.0.beta1/lib/active_record.rb:32
               Rubinius::CodeLoader.require at kernel/common/code_loader.rb:243
                     Kernel(Object)#require at kernel/common/kernel.rb:705
                          Object#__script__ at boo.rb:4
           Rubinius::CodeLoader#load_script at kernel/delta/code_loader.rb:66
           Rubinius::CodeLoader.load_script at kernel/delta/code_loader.rb:152
                    Rubinius::Loader#script at kernel/loader.rb:649
                      Rubinius::Loader#main at kernel/loader.rb:825