From: nobu@...
Date: 2017-06-16T02:28:03+00:00
Subject: [ruby-core:81696] [Ruby trunk Bug#13446][Assigned] refinements with prepend for module has strange behavior

Issue #13446 has been updated by nobu (Nobuyoshi Nakada).

Description updated
Status changed from Open to Assigned
Assignee set to nobu (Nobuyoshi Nakada)

----------------------------------------
Bug #13446: refinements with prepend for module has strange behavior
https://bugs.ruby-lang.org/issues/13446#change-65384

* Author: mtsmfm (Fumiaki Matsushima)
* Status: Assigned
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* Target version: 
* ruby -v: ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux]
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
~~~ruby
using Module.new {
  refine Enumerable do
    alias :orig_sum :sum
  end
}

module Enumerable
  def sum(*args)
    orig_sum(*args)
  end
end

class GenericEnumerable
  include Enumerable

  def each
  end
end

# GenericEnumerable.new.sum # if we uncomment this line, `GenericEnumerable#sum` will work
Enumerable.prepend(Module.new) # if we comment out this line, `GenericEnumerable#sum` will work

p GenericEnumerable.new.sum # undefined method `orig_sum' for #<GenericEnumerable:0x0000000127c120 @values=[1, 2, 3]> (NoMethodError)
~~~

Is this intentional?



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