* vm_insnhelper.c (vm_call_method): stop method search when a method

is not found in a refinement, to support undef in refinements.
  [ruby-core:66741] [Bug #10578]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49554 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Tue Feb 10 11:38:28 2015  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* vm_insnhelper.c (vm_call_method): stop method search when a method
+	  is not found in a refinement, to support undef in refinements.
+	  [ruby-core:66741] [Bug #10578]
+
 Tue Feb 10 11:19:11 2015  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* lib/net/ftp.rb (chdir, delete, gettextfile, mdtm, mkdir, nlst,

test/ruby/test_refinement.rb

@@ -1387,6 +1387,19 @@ class TestRefinement < Test::Unit::TestCase
                    :foo, bug10826)
   end
 
+  def test_undef_original_method
+    assert_in_out_err([], <<-INPUT, ["NoMethodError"], [])
+      module NoPlus
+        refine String do
+          undef +
+        end
+      end
+
+      using NoPlus
+      "a" + "b" rescue p($!.class)
+    INPUT
+  end
+
   private
 
   def eval_using(mod, s)

vm_insnhelper.c

@@ -1752,6 +1752,10 @@ vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
 			goto start_method_dispatch;
 		    }
 		}
+		else {
+		    ci->me = 0;
+		    goto start_method_dispatch;
+		}
 
 	      no_refinement_dispatch:
 		if (ci->me->def->body.orig_me) {