19 lines
718 B
JavaScript
19 lines
718 B
JavaScript
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// 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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// lastIndex is set according to funny rules. It is typically set only
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// for global or sticky RegExps, but on a failure to find a match, it is
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// set unconditionally. If a set fails, then it acts as if in strict mode
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// and throws.
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var re = /x/;
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Object.defineProperty(re, 'lastIndex', {writable: false});
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assertThrows(() => re.exec(""), TypeError);
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assertEquals(["x"], re.exec("x"));
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var re = /x/y;
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Object.defineProperty(re, 'lastIndex', {writable: false});
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assertThrows(() => re.exec(""), TypeError);
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assertThrows(() => re.exec("x"), TypeError);
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