Chromium Code Reviews| Index: runtime/vm/isolate.h | 
| diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h | 
| index 908e64171e16736a7d3ffc659865359589f4cf6c..fab7049dd5b798b1ddf05c1491160a106603efd1 100644 | 
| --- a/runtime/vm/isolate.h | 
| +++ b/runtime/vm/isolate.h | 
| @@ -912,9 +912,7 @@ class StartIsolateScope { | 
| if (saved_isolate_ != new_isolate_) { | 
| new_isolate_->ClearStackLimit(); | 
| Thread::ExitIsolate(); | 
| - if (saved_isolate_ != NULL) { | 
| - Thread::EnterIsolate(saved_isolate_); | 
| - } | 
| + ASSERT(saved_isolate_ == NULL); | 
| } | 
| } |