| Index: src/runtime/runtime-strings.cc
 | 
| diff --git a/src/runtime/runtime-strings.cc b/src/runtime/runtime-strings.cc
 | 
| index f1070b76b2ff4ac21782bd484286ff818f1a878c..c1f14adb277cd18a8e03024aab47246e8d34a824 100644
 | 
| --- a/src/runtime/runtime-strings.cc
 | 
| +++ b/src/runtime/runtime-strings.cc
 | 
| @@ -1056,7 +1056,7 @@
 | 
|    }
 | 
|  
 | 
|    Object* answer = ConvertCaseHelper(isolate, *s, *result, length, mapping);
 | 
| -  if (answer->IsException() || answer->IsString()) return answer;
 | 
| +  if (answer->IsException(isolate) || answer->IsString()) return answer;
 | 
|  
 | 
|    DCHECK(answer->IsSmi());
 | 
|    length = Smi::cast(answer)->value();
 | 
| 
 |