* vm_insnhelper.c (vm_call_method): protected singleton methods of

  an object should not be able to called from other instances of the
  class of the object.  [ruby-core:26761]
* vm_eval.c (rb_method_call_status): ditto.
* test/ruby/test_module.rb (test_protected_singleton_method): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25796 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 24 insertions, 0 deletions

diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 59c965325f..92b2f7b561 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -854,4 +854,28 @@ class TestModule < Test::Unit::TestCase
     end
     assert_equal("", stderr)
   end
+
+  def test_protected_singleton_method
+    klass = Class.new
+    x = klass.new
+    class << x
+      protected
+
+      def foo
+      end
+    end
+    assert_raise(NoMethodError) do
+      x.foo
+    end
+    klass.send(:define_method, :bar) do
+      x.foo
+    end
+    assert_nothing_raised do
+      x.bar
+    end
+    y = klass.new
+    assert_raise(NoMethodError) do
+      y.bar
+    end
+  end
 end