290231 2025-03-21 18:30:20 -0700 REGRESSION(291808@main): [macOS Debug]: ASSERTION FAILED: !index in CSSFontSelector::fallbackFontAt on html5lib/generated/run-entities01-data.html (290012) 2025-04-09 09:49:57 -0700 1 1 1 Unclassified WebKit Text Other Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 vitor.roriz webkit-unassigned darbinyan fantasai.bugs vitor.roriz webkit-bug-importer oldest_to_newest 2105205 0 vitor.roriz 2025-03-21 18:30:20 -0700 Settings control how we resolve generic font-family names. This bug happens because we were setting setFontFallbackPrefersPictographs(true) from another test, on the same process, before running run-entities01-data.html. This made the cached FontCascadeFont object to have its m_lastRealizedFallbackIndex expanded beyound effectiveFamilyCount(), making fontSelectorFallbackIndex turning 1. When running run-entities01-data.html, m_lastRealizedFallbackIndex is still retaining that value. However, fontSelector->fallbackFontCount() that comes from Settings is now 0 and we won't pass the check `fontSelectorFallbackIndex == fontSelector->fallbackFontCount()`. This lead us to a inconsistent state in which we call fallbackFontAt for resolving the pictographFontFamily, although we are stating by the index != 0 that we already did. We can fix this issue by considering the generic font families configuration from settings for building FontCascadeCache key. That way, we won't have false positive hits when settings differ. 2105206 1 vitor.roriz 2025-03-21 18:30:34 -0700 rdar://147365119 2105210 2 vitor.roriz 2025-03-21 18:43:21 -0700 Pull request: https://github.com/WebKit/WebKit/pull/42857 2105473 3 ap 2025-03-23 17:30:32 -0700 *** Bug 290012 has been marked as a duplicate of this bug. *** 2105475 4 ap 2025-03-23 17:30:42 -0700 *** Bug 290230 has been marked as a duplicate of this bug. *** 2106474 5 ews-feeder 2025-03-27 09:40:54 -0700 Committed 292764@main (0d680136cb51): <https://commits.webkit.org/292764@main> Reviewed commits have been landed. Closing PR #42857 and removing active labels. 2109961 6 ews-feeder 2025-04-09 09:49:57 -0700 Test gardening commit 289651.418@safari-7621-branch (8fdeff9ee1d6): <https://commits.webkit.org/289651.418@safari-7621-branch> Reviewed commits have been landed. Closing PR #2979 and removing active labels.