27 lines
708 B
JavaScript
27 lines
708 B
JavaScript
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// Copyright 2015 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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function Parent() {}
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function Child() {}
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Child.prototype = new Parent();
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var child = new Child();
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function crash() {
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return child.__proto__;
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}
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crash();
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crash();
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// Trigger a fast->slow->fast dance of Parent.prototype's map...
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Parent.prototype.__defineSetter__("foo", function() { print("A"); });
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Parent.prototype.__defineSetter__("foo", function() { print("B"); });
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// ...and collect more type feedback.
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crash();
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// Now modify the prototype chain. The right cell fails to get invalidated.
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delete Object.prototype.__proto__;
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crash();
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