1e5b2358a7
V8 implements "delete this" as "LdaTrue", but an error needs to be thrown if done in a constructor before calling super. ThrowIfHole checks the accumulator, so we need to load 'this' into the accumulator. The check is inserted by the load since it has HoleCheckMode::kRequired Bug: https://bugs.chromium.org/p/v8/issues/detail?id=6711 Change-Id: I9f2ce4439505cec4327d88d1195898782edea721 Reviewed-on: https://chromium-review.googlesource.com/c/1419084 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Commit-Queue: Matt Gardner <magardn@microsoft.com> Cr-Commit-Position: refs/heads/master@{#59007}
22 lines
502 B
JavaScript
22 lines
502 B
JavaScript
// 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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// ensure `delete this` throws before `super` is called.
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assertThrows(()=>{
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new class extends Object {
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constructor() {
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delete this;
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super();
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}
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}
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}, ReferenceError);
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// ensure `delete this` doesn't throw after `super` is called.
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new class extends Object {
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constructor() {
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super();
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delete this;
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}
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}
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