| Index: src/runtime/runtime-debug.cc | 
| diff --git a/src/runtime/runtime-debug.cc b/src/runtime/runtime-debug.cc | 
| index 4d2bd84caceead860ed68c39b5114d91f305e5de..c35bbe821ecfb6147377920e076257a04e20a69e 100644 | 
| --- a/src/runtime/runtime-debug.cc | 
| +++ b/src/runtime/runtime-debug.cc | 
| @@ -766,7 +766,7 @@ | 
|  | 
| // Add the receiver (same as in function frame). | 
| Handle<Object> receiver(it.frame()->receiver(), isolate); | 
| -  DCHECK(function->shared()->IsUserJavaScript()); | 
| +  DCHECK(!function->shared()->IsBuiltin()); | 
| DCHECK_IMPLIES(is_sloppy(shared->language_mode()), receiver->IsJSReceiver()); | 
| details->set(kFrameDetailsReceiverIndex, *receiver); | 
|  | 
|  |