Bug #13800: Possible regression of Object#method in Ruby 2.3+ for aliases

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: 2.2.3, 2.2.7, 2.3.0, 2.3.3, 2.3.4, 2.4.1
• Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN

[jmanian (Jeff Manian)]

The behavior of Object#method changed in 2.3 when using it to compare aliases. The change is best illustrated below:

module Foo
  def foo
  end
  alias_method :foo_foo, :foo
end

class Bar
  include Foo
  alias_method :bar, :foo
end

bar = Bar.new
bar.method(:foo) == bar.method(:bar)
# true in Ruby 2.2
# false in Ruby 2.3 and 2.4

bar.method(:foo) == bar.method(:foo_foo)
# true in Ruby 2.2, 2.3, 2.4

Was this an intentional change in 2.3 or a regression?
I tested this with 2.2.3, 2.2.7, 2.3.0, 2.3.3, 2.3.4, and 2.4.1.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Rejected

It's intentional.
See https://bugs.ruby-lang.org/issues/7613#change-35118