a93e5221d8
Don't ignore IfException (and IfSuccess) projections on JSForInNext nodes during JSTypedLowering::ReduceJSForInNext, but instead rewrire the IfException projection to the ForInFilter stub call, which can throw exceptions in case of proxies. R=yangguo@chromium.org BUG=v8:6121 Review-Url: https://codereview.chromium.org/2761703002 Cr-Commit-Position: refs/heads/master@{#43925}
24 lines
498 B
JavaScript
24 lines
498 B
JavaScript
// Copyright 2017 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 foo(o) {
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try {
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for (var x in o) {}
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return false;
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} catch (e) {
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return true;
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}
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}
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var o = new Proxy({a:1},{
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getOwnPropertyDescriptor(target, property) { throw target; }
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});
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assertTrue(foo(o));
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assertTrue(foo(o));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(o));
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