NoMethodError: undefined method `include' for A:Class

[endofunky]

Nested includes with a Module.included in between spread over multiple files throws a NoMethodError. This is on the latest 9.0.0.0 SNAPSHOT installed with ruby-build.

Example:

File a.rb:

require_relative 'b'

class A
  include B
end

File b.rb:

module C
end

module B
  def self.included(klass)
    klass.include C
  end
end

Output:

$ ruby ./a.rb
NoMethodError: undefined method `include' for A:Class
  method_missing at org/jruby/RubyBasicObject.java:1600
        included at /home/toby/jruby-bug/b.rb:6
         include at org/jruby/RubyModule.java:2220
           A_0_1 at ./a.rb:7
      __script__ at ./a.rb:6

However, if the modules in file b.rb are defined in the same file a.rb everything works fine. Both ways work in MRI.

[headius]

I think this is a simple visibility problem: ruby/ruby@26766ee