gistfile1.txt

> ruby -v
rubinius 2.0.0dev (1.9.3 9080ef89 yyyy-mm-dd JI) [x86_64-unknown-linux-gnu]
> ruby lol.rb
An exception occurred running lol.rb
    Missing or uninitialized constant: Wat::Hash (NameError)

Backtrace:
              Module#const_missing at kernel/common/module.rb:472
               Autoload#find_const at kernel/common/autoload19.rb:27
                     Autoload#call at kernel/common/autoload19.rb:16
         Wat.__module_init__ (Wat) at omg.rb:2
                 Object#__script__ at omg.rb:1
      Rubinius::CodeLoader.require at kernel/common/codeloader.rb:207
                     Autoload#call at kernel/common/autoload19.rb:13
                 Object#__script__ at lol.rb:9
  Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:67
  Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:109
           Rubinius::Loader#script at kernel/loader.rb:630
             Rubinius::Loader#main at kernel/loader.rb:834

---

> RBXOPT=-X18 ruby -v
rubinius 2.0.0dev (1.8.7 9080ef89 yyyy-mm-dd JI) [x86_64-unknown-linux-gnu]
> RBXOPT=-X18 ruby lol.rb
An exception occurred running lol.rb
    Missing or uninitialized constant: Wat::Hash (NameError)

Backtrace:
              Module#const_missing at kernel/common/module.rb:472
               Autoload#find_const at kernel/common/autoload18.rb:43
                     Autoload#call at kernel/common/autoload18.rb:30
         Wat.__module_init__ (Wat) at omg.rb:2
                 Object#__script__ at omg.rb:1
      Rubinius::CodeLoader.require at kernel/common/codeloader.rb:207
                     Autoload#call at kernel/common/autoload18.rb:17
                 Object#__script__ at lol.rb:9
  Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:67
  Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:109
           Rubinius::Loader#script at kernel/loader.rb:630
             Rubinius::Loader#main at kernel/loader.rb:834

---

> ruby -v
ruby 1.8.7 (2011-12-28 patchlevel 357) [x86_64-linux]
> ruby lol.rb 
[Wat::Hash, Hash, Enumerable, Object, Kernel]

---

> ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]
> ruby lol.rb
[Wat::Hash, Hash, Enumerable, Object, Kernel, BasicObject]

lol.rb

$:.unshift '.'

module Wat
  autoload :Hash, 'omg'
end

puts Wat::Hash.ancestors.inspect

omg.rb

module Wat
  class Hash < Hash
  end
end