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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>
33 lines
636 B
JavaScript
33 lines
636 B
JavaScript
// Copyright 2016 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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var thrower = {
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[Symbol.toPrimitive]: function() {
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FAIL;
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}
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};
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function testTrace(func) {
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try {
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func(thrower);
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assertUnreachable();
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} catch (e) {
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assertTrue(e.stack.indexOf("fromCharCode") >= 0);
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}
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}
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testTrace(String.fromCharCode);
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function foo(x) {
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return String.fromCharCode(x);
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};
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%PrepareFunctionForOptimization(foo);
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foo(1);
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foo(2);
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testTrace(foo);
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%OptimizeFunctionOnNextCall(foo);
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testTrace(foo);
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