Bug #12058: Unexpected value of __callee__ when including a module

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN

[jessesielaff (Jesse Sielaff)]

I noticed a surprising behavior when invoking __callee__ in an aliased method.

When invoked via a method created by alias_method, __callee__ ignores the name of the old method (here xxx) and returns the name of the new method, as below:

class Foo
  def xxx() __callee__ end
  alias_method :foo, :xxx
end

Foo.new.foo # => :foo

This behavior holds even when xxx is inherited from a superclass:

class Sup
  def xxx() __callee__ end
end

class Bar < Sup
  alias_method :bar, :xxx
end

Bar.new.bar # => :bar

Given both of the above, I would expect that the same behavior would hold when xxx is included via a module. However, that is not the case:

module Mod
  def xxx() __callee__ end
end

class Baz
  include Mod
  alias_method :baz, :xxx
end

Baz.new.baz # => :xxx

I expect the return value to be :baz, not :xxx.

Is this a bug, or is there an important difference between superclass inheritance and module inclusion that I've failed to grasp here?

Origin: http://stackoverflow.com/questions/35281623/unexpected-value-of-callee-when-including-a-module-is-this-a-ruby-bug

[jessesielaff (Jesse Sielaff)]

• ruby -v changed from 2.3.0p0 to ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]

[nobu (Nobuyoshi Nakada)]

• Is duplicate of Bug #11964: __callee__ in aliased methods defined in a module returns an incorrect value added

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Seems fixed by r56592.