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PR-URL: https://github.com/nodejs/node/pull/47251 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Richard Lau <rlau@redhat.com>
34 lines
1.0 KiB
JavaScript
34 lines
1.0 KiB
JavaScript
// Copyright 2022 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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// Flags: --omit-default-ctors --allow-natives-syntax --turbofan
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// Flags: --no-always-turbofan
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// This behavior is not spec compliant, see crbug.com/v8/13249.
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(function ArrayIteratorMonkeyPatched() {
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let iterationCount = 0;
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const oldIterator = Array.prototype[Symbol.iterator];
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Array.prototype[Symbol.iterator] =
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function () { ++iterationCount; return oldIterator.call(this); };
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class A {}
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class B extends A {}
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class C extends B {}
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%PrepareFunctionForOptimization(C);
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new C();
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%OptimizeFunctionOnNextCall(C);
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// C default ctor doing "...args" and B default ctor doing "...args".
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assertEquals(2, iterationCount);
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new C();
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// C default ctor doing "...args" and B default ctor doing "...args".
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assertEquals(4, iterationCount);
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assertOptimized(C); // No deopt.
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Array.prototype[Symbol.iterator] = oldIterator;
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})();
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