From: Run Paint Run Run <redmine@...>
Date: 2010-08-31T04:26:51+09:00
Subject: [ruby-core:31957] [Ruby 1.9-Bug#3769][Open] Removing Predefined Constants

Bug #3769: Removing Predefined Constants
http://redmine.ruby-lang.org/issues/show/3769

Author: Run Paint Run Run
Status: Open, Priority: Low
Category: core
ruby -v: ruby 1.9.3dev (2010-08-30 trunk 29147) [i686-linux]

The documentation for Module#remove_const states "Predefined classes and singleton objects (such as true) cannot be removed", but I believe the example below illustrates that they can. Is this a documentation or implementation bug?

  run@paint:~ ���  cat /tmp/remove_const.rb 
  Module.constants.grep(/(?<!Object)$/).tap do |c|
    c.each    {|_|  Object.class_eval{ remove_const _} }
    p c.select{|_| Object.const_defined? _}
  end
  run@paint:~ ���  ruby -vw /tmp/remove_const.rb 
  ruby 1.9.3dev (2010-08-30 trunk 29147) [i686-linux]
  []


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