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e31f0a7d25
PR-URL: https://github.com/nodejs/node/pull/28918 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
25 lines
536 B
JavaScript
25 lines
536 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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%PrepareFunctionForOptimization(foo);
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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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