Bug #11425: super_method fails to find the super method when combined with Module#prepend

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0dev (2015-08-09 trunk 51513) [x86_64-darwin14]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[matsuda (Akira Matsuda)]

super_method now fails to find the target method of Module#prepend maybe since 51501 https://github.com/ruby/ruby/commit/6b7c4df

class C; def a() end end
module M def a() end end
C.prepend M
p C.instance_method(:a).super_method

ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14]
#=> #<UnboundMethod: Object(C)#a>

ruby 2.3.0dev (2015-08-09 trunk 51513) [x86_64-darwin14]
#=> nil

[matsuda (Akira Matsuda)]

• File bug11425.patch bug11425.patch added

This happens only for UnboundMethod.

C.new.method(:a).super_method

correctly returns a Method.

Attached a patch with a failing test case.

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)

Another issue, UnboundMethod#inspect in 2.2 also seems wrong.
It should be "#<UnboundMethod: C#a>".

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed

This was fixed between Ruby 2.3 and 2.4:

$ ruby23 -e '
> class C; def a() end end
> module M def a() end end
> C.prepend M
> p C.instance_method(:a).super_method
> '
nil
$ ruby24 -e '
> class C; def a() end end
> module M def a() end end
> C.prepend M
> p C.instance_method(:a).super_method
> '
#<UnboundMethod: C#a>