vm_insnhelper.c: revive r44455 for bound module method

* vm_insnhelper.c (vm_search_super_method): when super called in a
  bound UnboundMethod generated from a module, no superclass is
  found since the current defined class is the module, then call
  method_missing in that case.  [ruby-core:59619] [Bug ruby#9377]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44527 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Conflicts:
	ChangeLog

Author: nobu

test/ruby/test_super.rb

@@ -440,4 +440,17 @@ def foo
       assert_equal(:ok, o.method(:foo).call, bug9315)
     end
   end
+
+  def test_missing_super_in_module_unbound_method
+    bug9377 = '[ruby-core:59619] [Bug #9377]'
+
+    a = Module.new do
+      def foo; super end
+    end
+
+    m = a.instance_method(:foo).bind(Object.new.extend(a))
+    assert_raise(NoMethodError, bug9377) do
+      m.call
+    end
+  end
 end

vm_insnhelper.c

@@ -2024,6 +2024,12 @@ vm_search_super_method(rb_thread_t *th, rb_control_frame_t *reg_cfp, rb_call_inf
 		 " by define_method() is not supported."
 		 " Specify all arguments explicitly.");
     }
+    if (!ci->klass) {
+	/* bound instance method of module */
+	ci->aux.missing_reason = NOEX_SUPER;
+	CI_SET_FASTPATH(ci, vm_call_method_missing, 1);
+	return;
+    }
 
     /* TODO: use inline cache */
     ci->me = rb_method_entry(ci->klass, ci->mid, &ci->defined_class);