should use defined_class.

* vm_insnhelper.c (vm_call_method_each_type): we should use me->defined_class
  instead of me->owner because me->owner doesn't has correct ancestors list.
  [Bug #15427]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66436 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_module.rb

@@ -2352,6 +2352,24 @@ class TestModule < Test::Unit::TestCase
     end;
   end
 
+  def test_private_extended_module
+    assert_separately [], %q{
+      class Object
+        def bar; "Object#bar"; end
+      end
+      module M1
+        def bar; super; end
+      end
+      module M2
+        include M1
+        private(:bar)
+        def foo; bar; end
+      end
+      extend M2
+      assert_equal 'Object#bar', foo
+    }
+  end
+
   private
 
   def assert_top_method_is_private(method)