Bug #12761: Ruby 2.3.1 has a bug in `Module#alias` and `Module#alias_method`

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux], ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]
• Backport: 2.2: DONTNEED, 2.3: DONE

[mudasobwa (Alexei Matyushkin)]

Consider the following code:

    module M
      def original ; puts __callee__ ; end
      alias_method :aliased, :original
    end
    class A
      include M
    end

    A.new.original
    #⇒ original
    A.new.aliased
    #⇒ aliased

The above code runs perfectly fine in Ruby 2.1 and returns the actual method name, as it is supposed to be done by Kernel#__callee__.

Surprisingly enough, the code above does not work as expected in Ruby 2.3.1:

    A.new.original
    #⇒ original
    A.new.aliased
    #⇒ original

The same happens for alias as well.

[shyouhei (Shyouhei Urabe)]

• Related to Bug #12176: method equality of aliased methods breakage on 2.3 added

[shyouhei (Shyouhei Urabe)]

• Related to Bug #11964: __callee__ in aliased methods defined in a module returns an incorrect value added

[shyouhei (Shyouhei Urabe)]

IMHO this is a known bug yet to be fixed.

[litmon (Fukuo Kadota)]

This is resolved version ruby-2.4.1.

[shyouhei (Shyouhei Urabe)]

• Status changed from Open to Closed

Closing. Thank you for confirmation.

[usa (Usaku NAKAMURA)]

• Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.2: DONTNEED, 2.3: DONE