Bug 314100 – REGRESSION(312288@main): [macOS] imported/w3c/web-platform-tests/css/selectors/has-specificity.html is a flaky crash

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: New Bugs

[Marta Darbinyan]

The following test is a flaky crash on macOS. 
imported/w3c/web-platform-tests/css/selectors/has-specificity.html

2026-05-05 05:09:54.964 com.apple.WebKit.WebContent[3527:197312] CoreText performance note: Client called CTFontCreateWithName() using name "Times New Roman" and got font with PostScript name "TimesNewRomanPSMT". For best performance, only use PostScript names when calling this API.
2026-05-05 05:09:54.964 com.apple.WebKit.WebContent[3527:197312] CoreText performance note: Client called CTFontCreateWithName() using name "Menlo Regular" and got font with PostScript name "Menlo-Regular". For best performance, only use PostScript names when calling this API.
2026-05-05 05:09:54.965 com.apple.WebKit.WebContent[3527:197312] CoreText performance note: Client called CTFontCreateWithName() using name "Arial" and got font with PostScript name "ArialMT". For best performance, only use PostScript names when calling this API.
com.apple.WebKit.WebContent.Development terminated (pid 3527) for reason: crash

Test results:
https://ews-build.webkit.org/#/builders/154/builds/25734

Test history:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fselectors%2Fhas-specificity.html

[Radar WebKit Bug Importer]

<rdar://problem/176274161>

[EWS]

Test gardening commit 312624@main (676d042ebd9c): <https://commits.webkit.org/312624@main>

Reviewed commits have been landed. Closing PR #64281 and removing active labels.

[Brent Fulgham]

This is actually due to the change adding ::has() support to the CSS JIT.

[Brent Fulgham]

Pull request: https://github.com/WebKit/WebKit/pull/64300

[Brent Fulgham]

We decided to revert the CSS JIT change that created this issue, rather than attempt to fix on-the-fly. This is now a dupe of the revert, which resolves the test failure (Bug 314205).

*** This bug has been marked as a duplicate of bug 314205 ***