| Index: test/cctest/heap/test-heap.cc
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| diff --git a/test/cctest/heap/test-heap.cc b/test/cctest/heap/test-heap.cc
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| index 691f0b0cd73774bb7dc3ea9a7e1049d290255472..88aee8adf89e4794ded2445a3261d83a01ca650f 100644
 | 
| --- a/test/cctest/heap/test-heap.cc
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| +++ b/test/cctest/heap/test-heap.cc
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| @@ -5703,9 +5703,10 @@ TEST(Regress388880) {
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|    Heap* heap = isolate->heap();
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|  
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|    Handle<Map> map1 = Map::Create(isolate, 1);
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| +  Handle<String> name = factory->NewStringFromStaticChars("foo");
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| +  name = factory->InternalizeString(name);
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|    Handle<Map> map2 =
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| -      Map::CopyWithField(map1, factory->NewStringFromStaticChars("foo"),
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| -                         FieldType::Any(isolate), NONE,
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| +      Map::CopyWithField(map1, name, FieldType::Any(isolate), NONE,
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|                           Representation::Tagged(), OMIT_TRANSITION)
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|            .ToHandleChecked();
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|  
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| 
 |