292429 2025-05-02 04:38:58 -0700 [Regex] Nested negated classes leads to incorrect matches 2025-05-22 09:36:49 -0700 1 1 1 Unclassified WebKit JavaScriptCore Safari 18 All All RESOLVED FIXED InRadar P2 Normal --- 1 ames_cedre_8b daniel_liu4 keith_miller msaboff steves_list webkit-bug-importer oldest_to_newest 2114642 0 ames_cedre_8b 2025-05-02 04:38:58 -0700 As identified in https://github.com/shikijs/shiki#1005, a WebKit bug results in nested negated character classes being treated as if they weren't negated. For example, in WebKit (as of Safari 18.4), /[a[^a-z]]/v incorrectly matches 'b' and incorrectly fails to match '!'. This can be worked around by converting e.g. [a[^a-z]] to (?:[a]|[^a-z]). 2116079 1 webkit-bug-importer 2025-05-09 04:42:05 -0700 <rdar://problem/151000852> 2118837 2 daniel_liu4 2025-05-21 16:02:29 -0700 Pull request: https://github.com/WebKit/WebKit/pull/45731 2118999 3 ews-feeder 2025-05-22 09:36:47 -0700 Committed 295277@main (c07d637bf020): <https://commits.webkit.org/295277@main> Reviewed commits have been landed. Closing PR #45731 and removing active labels.