290012 2025-03-18 17:22:24 -0700 REGRESSION(291808@main): [macOS Debug]: ASSERTION FAILED: !index in CSSFontSelector::fallbackFontAt 2025-03-23 17:30:32 -0700 1 1 1 Unclassified WebKit Text WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 290231 InRadar P2 Normal --- 1 darbinyan webkit-unassigned fantasai.bugs vitor.roriz webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2104219 0 darbinyan 2025-03-18 17:22:24 -0700 The following test is failing with assertion in macOS Debug queue in EWS. The test is also failing on post-commit bots. html5lib/generated/run-entities01-data.html The change 291808@main is in the regression range when the test started crashing. Crash logs: stderr: ASSERTION FAILED: !index /Volumes/Data/worker/macOS-Sequoia-Debug-Build-EWS/build/Source/WebCore/css/CSSFontSelector.cpp(434) : virtual RefPtr<Font> WebCore::CSSFontSelector::fallbackFontAt(const FontDescription &, size_t) 1 0x3042a891c WebCore::CSSFontSelector::fallbackFontAt(WebCore::FontDescription const&, unsigned long) 2 0x306360784 WebCore::FontCascadeFonts::realizeFallbackRangesAt(WebCore::FontCascadeDescription const&, WebCore::FontSelector*, unsigned int) 3 0x306361628 WebCore::FontCascadeFonts::glyphDataForVariant(char32_t, WebCore::FontCascadeDescription const&, WebCore::FontSelector*, WebCore::FontVariant, WebCore::ResolvedEmojiPolicy, unsigned int) 4 0x30635697c WebCore::FontCascadeFonts::glyphDataForCharacter(char32_t, WebCore::FontCascadeDescription const&, WebCore::FontSelector*, WebCore::FontVariant, WebCore::ResolvedEmojiPolicy) 5 0x3063565f0 WebCore::FontCascade::glyphDataForCharacter(char32_t, bool, WebCore::FontVariant) const 6 0x306356b9c WebCore::FontCascade::canUseSimplifiedTextMeasuring(char32_t, WebCore::FontVariant, bool, WebCore::Font const&) const 7 0x306d75990 WebCore::RenderText::initiateFontLoadingByAccessingGlyphDataAndComputeCanUseSimplifiedTextMeasuring(WTF::String const&) 8 0x306d75c08 WebCore::RenderText::styleDidChange(WebCore::StyleDifference, WebCore::RenderStyle const*) 9 0x306bbfcd0 WebCore::RenderElement::didAttachChild(WebCore::RenderObject&, WebCore::RenderObject*) 10 0x306fcb6a4 WebCore::RenderTreeBuilder::attachToRenderElement(WebCore::RenderElement&, std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>, WebCore::RenderObject*) 11 0x306fcbe1c WebCore::RenderTreeBuilder::Block::attachIgnoringContinuation(WebCore::RenderBlock&, std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>, WebCore::RenderObject*) 12 0x306fcb3a0 WebCore::RenderTreeBuilder::Block::attach(WebCore::RenderBlock&, std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>, WebCore::RenderObject*) 13 0x306fcae5c WebCore::RenderTreeBuilder::BlockFlow::attach(WebCore::RenderBlockFlow&, std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>, WebCore::RenderObject*) 14 0x306fca25c WebCore::RenderTreeBuilder::attachInternal(WebCore::RenderElement&, std::__1::unique_ptr<WebCore::RenderObject, WebCore::RenderObjectDeleter>, WebCore::RenderObject*) Test history: https://results.webkit.org/?suite=layout-tests&test=html5lib%2Fgenerated%2Frun-entities01-data.html&flavor=wk2&style=debug Test result: https://ews-build.webkit.org/#/builders/122/builds/16565 2104220 1 webkit-bug-importer 2025-03-18 17:23:09 -0700 <rdar://problem/147365119> 2104225 2 ews-feeder 2025-03-18 17:37:50 -0700 Test gardening commit 292335@main (b095dac9cc00): <https://commits.webkit.org/292335@main> Reviewed commits have been landed. Closing PR #42664 and removing active labels. 2105207 3 ews-feeder 2025-03-21 18:33:07 -0700 Test gardening commit 292527@main (b21609f7adae): <https://commits.webkit.org/292527@main> Reviewed commits have been landed. Closing PR #42855 and removing active labels. 2105472 4 ap 2025-03-23 17:30:32 -0700 Looks like this got re-filed as bug 290231 for some reason. Duping forward, because that bug has a PR. *** This bug has been marked as a duplicate of bug 290231 ***