Issue #12176 has been updated by Nobuyoshi Nakada.

Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED

I think it is a bug.

----------------------------------------
Bug #12176: method equality of aliased methods breakage on 2.3
https://bugs.ruby-lang.org/issues/12176#change-57453

* Author: Shyouhei Urabe
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 
* Backport: 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED
----------------------------------------
Is this intentional?

~~~ruby
zsh % cat tmp.rb
module Foo
  def foo
    return __callee__
  end
end

class Bar
  include Foo
  alias bar foo
end

b = Bar.new

p b.foo
p b.bar
p(b.method(:foo) == b.method(:bar))
zsh % ruby22 -v tmp.rb
ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin15]
:foo
:bar
true
zsh % ruby23 -v tmp.rb
ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]
:foo
:foo
false
~~~



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