22 lines
536 B
JavaScript
22 lines
536 B
JavaScript
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// Copyright 2019 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: --allow-natives-syntax
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(function() {
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class A {}
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function foo(a, fn) {
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const C = a.constructor;
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fn(a);
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return a instanceof C;
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}
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assertTrue(foo(new A, (a) => {}));
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assertTrue(foo(new A, (a) => {}));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(new A, (a) => {}));
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assertFalse(foo(new A, (a) => { a.__proto__ = {}; }));
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})();
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