288223 2025-02-21 12:41:13 -0800 RegExp with /v incorrectly handles literal hyphen as creating an invalid range 2025-03-06 10:27:30 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build PC Windows 11 RESOLVED FIXED InRadar P2 Normal --- 1 steves_list webkit-unassigned karlcow mark.lam msaboff webkit-bug-importer oldest_to_newest 2096818 0 steves_list 2025-02-21 12:41:13 -0800 WebKit is throwing a SyntaxError for regexes when all of the following conditions are met: - The regex uses flag `v`. - The regex contains a character class with the following: - Any character set (ex: `\d` or `\p{L}`). - Immediately followed by any representation of a literal hyphen, such as `\-`, `\x2D`, or `\u002D`. - Followed by another token. When this occurs, WebKit treats the literal hyphen as if it was creating a range. So e.g. the perfectly valid regex `/[\d\-a]/v` is handled as if it were the invalid `/[\d-a]/v` and throws "SyntaxError: Invalid regular expression: invalid range in character class for Unicode pattern". 2096820 1 steves_list 2025-02-21 12:45:01 -0800 Example of this bug in the wild: https://github.com/shikijs/shiki/issues/927 2099354 2 webkit-bug-importer 2025-02-28 12:42:14 -0800 <rdar://problem/145874688> 2099708 3 sosuke 2025-03-01 21:30:50 -0800 Pull request: https://github.com/WebKit/WebKit/pull/41732 2101039 4 ews-feeder 2025-03-06 10:27:28 -0800 Committed 291709@main (7adb2e46f423): <https://commits.webkit.org/291709@main> Reviewed commits have been landed. Closing PR #41732 and removing active labels.