1bfb02471e
We cannot assign a meaningful type to Promise#catch() or Promise#finally(), since they both return whatever the invocation of 'then' on the receiver returns, and that is monkeypatchable by arbitrary user JavaScript. Bug: chromium:908309, v8:7253 Change-Id: Ib15f81c366938a1b1f10be6c6af85c1f3374b898 Reviewed-on: https://chromium-review.googlesource.com/c/1350789 Reviewed-by: Jaroslav Sevcik <jarin@chromium.org> Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#57828}
28 lines
697 B
JavaScript
28 lines
697 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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// Flags: --allow-natives-syntax
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const p = Object.defineProperty(Promise.resolve(), 'then', {
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value() { return 0; }
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});
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(function() {
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function foo() { return p.catch().catch(); }
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assertThrows(foo, TypeError);
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assertThrows(foo, TypeError);
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%OptimizeFunctionOnNextCall(foo);
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assertThrows(foo, TypeError);
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})();
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(function() {
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function foo() { return p.finally().finally(); }
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assertThrows(foo, TypeError);
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assertThrows(foo, TypeError);
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%OptimizeFunctionOnNextCall(foo);
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assertThrows(foo, TypeError);
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})();
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