| Index: src/hydrogen-instructions.cc | 
| diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc | 
| index f10937977c8f6393f301b9af0d2e05c7092a1a59..8d1e7f7f7159bb1f26e3b23f2164f6c6302682dc 100644 | 
| --- a/src/hydrogen-instructions.cc | 
| +++ b/src/hydrogen-instructions.cc | 
| @@ -3291,6 +3291,7 @@ HCheckMaps* HCheckMaps::New(Zone* zone, | 
| HValue* typecheck) { | 
| HCheckMaps* check_map = new(zone) HCheckMaps(value, zone, typecheck); | 
| check_map->map_set_.Add(map, zone); | 
| +  check_map->has_migration_target_ = map->is_migration_target(); | 
| if (map->CanOmitMapChecks() && | 
| value->IsConstant() && | 
| HConstant::cast(value)->InstanceOf(map)) { | 
|  |