* ext/psych/lib/psych/core_ext.rb: Make Kernel#y private.

[ruby-core:38913]
* test/psych/test_yaml.rb: corresponding test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sat Aug 13 09:26:24 2011  Aaron Patterson <aaron@tenderlovemaking.com>
+
+	* ext/psych/lib/psych/core_ext.rb: Make Kernel#y private.
+	  [ruby-core:38913]
+	* test/psych/test_yaml.rb: corresponding test.
+
 Sat Aug 13 09:05:16 2011  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* ext/date/date_core.c (date_strftime_alloc): followed the change

ext/psych/lib/psych/core_ext.rb

@@ -36,4 +36,5 @@ module Kernel
   end
   remove_method :y rescue nil
   alias y psych_y
+  private :y
 end

test/psych/test_yaml.rb

@@ -3,6 +3,7 @@
 # $Id$
 #
 require 'psych/helper'
+require 'ostruct'
 
 # [ruby-core:01946]
 module Psych_Tests
@@ -14,6 +15,12 @@ class Psych_Unit_Tests < Psych::TestCase
         Psych.domain_types.clear
     end
 
+    def test_y_method
+      assert_raises(NoMethodError) do
+        OpenStruct.new.y 1
+      end
+    end
+
     def test_syck_compat
       time = Time.utc(2010, 10, 10)
       yaml = Psych.dump time