mirror of https://github.com/tc39/test262.git
14 lines
505 B
JavaScript
14 lines
505 B
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Check that encountering deprecated Maps does not cause CloneObjectIC to
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// crash.
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var obj1 = { x: 1 };
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var obj2 = { x: 2 }; // same map
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obj2.x = null; // deprecate map
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function f() { return { ...obj1 } };
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assertEquals({ x: 1 }, f()); // missed, object migrated to cached new map
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assertEquals({ x: 1 }, f()); // monomorphic cache-hit
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