From: Dion Mendel <redmine@...>
Date: 2010-12-01T22:24:23+09:00
Subject: [ruby-core:33506] [Ruby 1.9-Bug#4106][Open] 1.9.2 regression - invoking protected singleton methods

Bug #4106: 1.9.2 regression - invoking protected singleton methods
http://redmine.ruby-lang.org/issues/show/4106

Author: Dion Mendel
Status: Open, Priority: Normal
Category: core
ruby -v: ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux]

Issue:

Invoking a method that has been made protected in an object's
singleton class fails with
    NoMethodError: protected method `xxxx' called.

Invoking this protected method succeeds in 1.8.7 and 1.9.1.

Relevant code snippet:

   class < a
     protected :meth
   end

Test case:

In 1.8.7 and 1.9.1, code will output "method called"
In 1.9.2 code raises NoMethodError test.rb:13:in `test': protected method `meth' called for #<A:0x91477d4>

----
class A
  def meth
    puts 'method called'
  end

  def test
    a = A.new

    class << a
      protected :meth
    end

    a.meth  # fails in 1.9.2
  end
end

a = A.new
a.test


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