| Index: src/heap/incremental-marking.cc | 
| diff --git a/src/heap/incremental-marking.cc b/src/heap/incremental-marking.cc | 
| index c250b90b1c99d260be6ae137d212ca02bc97db35..4c57ecc8332849fdd62834d2ebd7989603db8d2d 100644 | 
| --- a/src/heap/incremental-marking.cc | 
| +++ b/src/heap/incremental-marking.cc | 
| @@ -547,6 +547,7 @@ void IncrementalMarking::StartMarking() { | 
| MarkCompactCollector::kMaxMarkingDequeSize); | 
|  | 
| ActivateIncrementalWriteBarrier(); | 
| +  heap_->array_buffer_tracker()->ResetTrackersInOldSpace(); | 
|  | 
| // Marking bits are cleared by the sweeper. | 
| #ifdef VERIFY_HEAP | 
|  |