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Bug #12164

closed

Binding UnboundMethod to BasicObject

Added by decuplet (Nikita Shilnikov) about 8 years ago. Updated about 8 years ago.

Status:
Closed
Assignee:
-
Target version:
-
ruby -v:
ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]
[ruby-core:74265]

Description

I tried to bind method from Object to BasicObject and I suddenly succeeded.
For example:

$ irb
2.3.0 :001 > BasicObject.send :define_method, :methods, Object.instance_method(:methods)
 => :methods
2.3.0 :002 > BasicObject.new.methods
 => [:!, :==, :!=, :__send__, :equal?, :methods, :instance_eval, :instance_exec, :__id__]
2.3.0 :003 >

In earlier ruby versions such code would raise an exception:

$ irb
2.2.4 :001 > BasicObject.send :define_method, :methods, Object.instance_method(:methods)
TypeError: bind argument must be a subclass of Object
	from (irb):1:in `define_method'
	from (irb):1
	from /Users/gordon/.rvm/rubies/ruby-2.2.4/bin/irb:11:in `<main>'
2.2.4 :002 >

Is it a bug or a feature?
Probably it is somehow related to https://bugs.ruby-lang.org/issues/11278


Related issues 1 (0 open1 closed)

Related to Ruby master - Bug #11278: remove rb_control_frame_t::klassClosedko1 (Koichi Sasada)Actions
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