dd92fe999b
A surrogate pair split by an "always succeeding" backreference (backreference capturing undefined, because it hasn't captured anything yet) was incorrectly combined into a surrogate pair, resulting in incorrect matches. Bug: v8:13410 Change-Id: I2faf9ca5f9fcfd55cd6933a1ea038c88f8d3f524 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4013159 Commit-Queue: Patrick Thier <pthier@chromium.org> Reviewed-by: Camillo Bruni <cbruni@chromium.org> Cr-Commit-Position: refs/heads/main@{#84276}
16 lines
771 B
JavaScript
16 lines
771 B
JavaScript
// Copyright 2022 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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// Make sure lone surrogates don't match combined surrogates.
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assertFalse(/[\ud800-\udfff]+/u.test('\ud801\udc0f'));
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// Surrogate pairs split by an "always succeeding" backref shouldn't match
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// combined surrogates.
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assertFalse(/(\ud801\1\udc0f)/u.test('\ud801\udc0f'));
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assertFalse(/(\ud801\1?\udc0f)/u.test('\ud801\udc0f'));
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assertFalse(/(\ud801\1{0}\udc0f)/u.test('\ud801\udc0f'));
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assertFalse(new RegExp('(\ud801\\1\udc0f)','u').test('\ud801\udc0f'));
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assertFalse(new RegExp('(\ud801\\1?\udc0f)','u').test('\ud801\udc0f'));
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assertFalse(new RegExp('(\ud801\\1{0}\udc0f)','u').test('\ud801\udc0f'));
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