vm_insnhelper.c: fix unusable super class

* vm_insnhelper.c (vm_call_method): unusable super class should cause
  method missing when BasicObject is refined but not been using.
  [ruby-core:64166] [Bug #10106]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47037 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sun Aug  3 10:43:08 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm_insnhelper.c (vm_call_method): unusable super class should cause
+	  method missing when BasicObject is refined but not been using.
+	  [ruby-core:64166] [Bug #10106]
+
 Sat Aug  2 23:47:45 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c: separate WIN32OLE::VARIANT src file

test/ruby/test_refinement.rb

@@ -1151,6 +1151,21 @@ class TestRefinement < Test::Unit::TestCase
     INPUT
   end
 
+  def test_refine_basic_object
+    assert_separately([], <<-"end;")
+    bug10106 = '[ruby-core:64166] [Bug #10106]'
+    module RefinementBug
+      refine BasicObject do
+        def foo
+          1
+        end
+      end
+    end
+
+    assert_raise(NoMethodError, bug10106) {Object.new.foo}
+    end;
+  end
+
   private
 
   def eval_using(mod, s)

vm_insnhelper.c

@@ -1823,6 +1823,10 @@ vm_call_method(rb_thread_t *th, rb_control_frame_t *cfp, rb_call_info_t *ci)
 		klass = RCLASS_ORIGIN(klass);
 	      zsuper_method_dispatch:
 		klass = RCLASS_SUPER(klass);
+		if (!klass) {
+		    ci->me = 0;
+		    goto start_method_dispatch;
+		}
 		ci_temp = *ci;
 		ci = &ci_temp;