From: "ara.t.howard" <ara.t.howard@...>
Date: 2009-09-28T15:12:17+09:00
Subject: [ruby-core:25814] [BUG]

i have been out of the loop on 1.9 development, but this sure looks
like a bug to me

cfp:~ > cat a.rb

  ClassMethods = lambda do
    def foo() 40 end
  end

  A = Module.new do
    self::ClassMethods = lambda do
      def bar() 2 end
    end
  end

  module B
    self::ClassMethods = lambda do
      def foobar() 42 end
    end
  end

  def factory(*args, &block)
    Class.new do
      singleton_class =
        class << self
          self
        end

      singleton_class.module_eval(&::ClassMethods)
      singleton_class.module_eval(&::A::ClassMethods)
      singleton_class.module_eval(&::B::ClassMethods)

      module_eval(&block)
    end
  end

  factory{
    foo()
    bar()
    foobar() #=> raises!
  }


cfp:~ > ruby19 a.rb

a.rb:41:in `block in <main>': undefined method `foobar' for #<Class:
0x3d106c> (NoMethodError)
        from a.rb:34:in `module_eval'
        from a.rb:34:in `block in factory'
        from a.rb:24:in `initialize'
        from a.rb:24:in `new'
        from a.rb:24:in `factory'
        from a.rb:38:in `<main>'


cfp:~ > ruby18 a.rb
(no output)