Forum: Ruby-core [ruby-trunk - Bug #7993][Open] owner of methods defined after using Module#prepend

Issue #7993 has been reported by no6v (Nobuhiro IMAI).

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Bug #7993: owner of methods defined after using Module#prepend
https://bugs.ruby-lang.org/issues/7993

Author: no6v (Nobuhiro IMAI)
Status: Open
Priority: Normal
Assignee:
Category: core
Target version:
ruby -v: RUBY_DESCRIPTION # => "ruby 2.1.0dev (2013-03-01 trunk 39546) 
[x86_64-linux]"


=begin
The owner of methods defined after using Module#prepend seems to be 
incorrect.

 RUBY_DESCRIPTION # => "ruby 2.1.0dev (2013-03-01 trunk 39546) 
[x86_64-linux]"

 class C
   attr_reader :a
   prepend Module.new
   attr_reader :b
 end
 C.instance_method(:a).owner # => C
 C.instance_method(:b).owner # => #<C:0x00000000a52300>
 C.new.method(:a).owner      # => C
 C.new.method(:b).owner      # => #<C:0x00000000a52300>

 module M
   attr_reader :a
   prepend Module.new
   attr_reader :b
 end
 M.instance_method(:a).owner # => M
 M.instance_method(:b).owner # =>
 # ~> -:19:in `<main>': undefined method `class' for 
#<M:0x00000000a515b8> (NoMethodError)
=end

Issue #7993 has been updated by marcandre (Marc-Andre Lafortune).


Agreed. I described this in [ruby-core:52261], part of issue #7842.
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Bug #7993: owner of methods defined after using Module#prepend
https://bugs.ruby-lang.org/issues/7993#change-37232

Author: no6v (Nobuhiro IMAI)
Status: Open
Priority: Normal
Assignee:
Category: core
Target version:
ruby -v: RUBY_DESCRIPTION # => "ruby 2.1.0dev (2013-03-01 trunk 39546) 
[x86_64-linux]"


=begin
The owner of methods defined after using Module#prepend seems to be 
incorrect.

 RUBY_DESCRIPTION # => "ruby 2.1.0dev (2013-03-01 trunk 39546) 
[x86_64-linux]"

 class C
   attr_reader :a
   prepend Module.new
   attr_reader :b
 end
 C.instance_method(:a).owner # => C
 C.instance_method(:b).owner # => #<C:0x00000000a52300>
 C.new.method(:a).owner      # => C
 C.new.method(:b).owner      # => #<C:0x00000000a52300>

 module M
   attr_reader :a
   prepend Module.new
   attr_reader :b
 end
 M.instance_method(:a).owner # => M
 M.instance_method(:b).owner # =>
 # ~> -:19:in `<main>': undefined method `class' for 
#<M:0x00000000a515b8> (NoMethodError)
=end