undefined method `add_builtin_type' on Psych (Module) (NoMethodError) using Rubinius 2.2.3

[derekstavis]

I'm trying to use Grape API Builder from a skeleton project:

https://github.com/mepatterson/goliath-skeleton

$ rvm --version
rvm 1.25.15 (stable

$ rbx --version
rubinius 2.2.3 (2.1.0 4792e746 2013-12-29 JI) [x86_64-linux-gnu]

$ bundle | grep psych
Using psych (2.0.2)

The stack trace when I run the server:

An exception occurred running app.rb:

    undefined method `add_builtin_type' on Psych (Module) (NoMethodError)

Backtrace:

  Kernel(Module)#add_builtin_type (method_missing) at kernel/delta/kernel.rb:78
                                Object#__script__ at /home/derek/.rvm/gems/rbx-2.2.3@ggskel/gems/activesupport-3.2.16/lib/active_support
                                                     /ordered_hash.rb:8
                      Rubinius::CodeLoader.require at kernel/common/code_loader.rb:243
                            Kernel(Object)#require at kernel/common/kernel.rb:705
                                 Object#__script__ at /home/derek/.rvm/gems/rbx-2.2.3@ggskel/gems/grape-0.6.1/lib/grape.rb:10
                      Rubinius::CodeLoader.require at kernel/common/code_loader.rb:243
                            Kernel(Object)#require at kernel/common/kernel.rb:705
                                 Object#__script__ at app.rb:8
                  Rubinius::CodeLoader#load_script at kernel/delta/code_loader.rb:66
                  Rubinius::CodeLoader.load_script at kernel/delta/code_loader.rb:201
                           Rubinius::Loader#script at kernel/loader.rb:649
                             Rubinius::Loader#main at kernel/loader.rb:831

[tenderlove]

Does it work with MRI? I'm not sure this is a Psych bug. /cc @dbussink

[dblock]

This was brought up by someone else in ruby-grape/grape#327 (comment), everything definitely works with MRI, but I haven't seen a repro yet for the issue at hand. Maybe @derekstavis you can help?

[derekstavis]

@dblock, at the time of comment I could reproduce the error just by creating a rvm gemset based on rbx and running the said project. I haven't followed up with it though, so I don't know if it was actually fixed.

[zedtux]

I'm facing this issue too by doing the following:

1. With RVM install ruby 2.2.0
2. brew install graphviz
3. gem install rails-erd
4. Run erd in a Rails project

I have then the following error:

erd
/Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/diagram/graphviz.rb:77: warning: duplicated key at line 83 ignored: :fontsize
/Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/activesupport-3.2.21/lib/active_support/ordered_hash.rb:8:in `<top (required)>': undefined method `add_builtin_type' for Psych:Module (NoMethodError)
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/activesupport-3.2.21/lib/active_support/ordered_options.rb:1:in `<top (required)>'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd.rb:1:in `<top (required)>'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/domain.rb:1:in `<top (required)>'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/diagram.rb:1:in `<top (required)>'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/diagram/graphviz.rb:2:in `<top (required)>'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/cli.rb:132:in `initialize'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/cli.rb:126:in `new'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/lib/rails_erd/cli.rb:126:in `start'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/gems/rails-erd-1.2.2/bin/erd:4:in `<top (required)>'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/bin/erd:23:in `load'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/bin/erd:23:in `<main>'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
  from /Users/guillaumehain/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'