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2dcc3665ab
PR-URL: https://github.com/nodejs/node/pull/28016 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
43 lines
828 B
JavaScript
43 lines
828 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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var count = 0;
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function load(a) {
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var prop = {
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toString: function() {
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count++;
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return 'z';
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}
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};
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a[prop] ^= 1;
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}
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function f(null_or_undefined) {
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// Turn the LoadIC megamorphic
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load({a0:1, z:2});
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load({a1:1, z:2});
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load({a2:1, z:2});
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load({a3:1, z:2});
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load({a4:1, z:2});
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// Now try null to check if generic IC handles this correctly.
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// It shouldn't call prop.toString.
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load(null_or_undefined);
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}
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try {
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f(null);
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} catch(error) {
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assertInstanceof(error, TypeError);
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assertSame(10, count);
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}
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try {
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count = 0;
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f(undefined);
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} catch(error) {
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assertInstanceof(error, TypeError);
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assertSame(10, count);
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}
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