| Index: src/string-stream.cc | 
| diff --git a/src/string-stream.cc b/src/string-stream.cc | 
| index 6e61c372d1119c8eeea7f02f85b8cdc050df650b..86aaac5ce0d4e26979e318459cb3c8db26a551d7 100644 | 
| --- a/src/string-stream.cc | 
| +++ b/src/string-stream.cc | 
| @@ -527,7 +527,7 @@ void StringStream::PrintPrototype(JSFunction* fun, Object* receiver) { | 
| Object* name = fun->shared()->name(); | 
| bool print_name = false; | 
| Isolate* isolate = fun->GetIsolate(); | 
| -  if (receiver->IsNull() || receiver->IsUndefined(isolate) || | 
| +  if (receiver->IsNull(isolate) || receiver->IsUndefined(isolate) || | 
| receiver->IsJSProxy()) { | 
| print_name = true; | 
| } else if (isolate->context() != nullptr) { | 
|  |