294587 2025-06-16 17:21:19 -0700 [ASSERTION FAILED: Custom property should be handled by applyCustomProperty] variable-css-wide-keywords.html crashes on Debug build 2025-07-02 05:56:27 -0700 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 294585 InRadar P2 Normal --- 1 ahmad.saleem792 webkit-unassigned koivisto sam webkit-bug-importer oldest_to_newest 2124097 0 ahmad.saleem792 2025-06-16 17:21:19 -0700 Hi Team, While importing css-variables from WPT, it seems we crash following WPT test case: WPT Test Case Live Link: http://wpt.live/css/css-variables/variable-css-wide-keywords.html EWS Link for crash logs: https://ews-build.s3-us-west-2.amazonaws.com/macOS-Sequoia-Debug-WK2-Tests-EWS/b6247bde-25889-stress-mode/results.html Crash log: No crash log found for com.apple.WebKit.WebContent.Development:12303. stdout: stderr: ASSERTION FAILED: Custom property should be handled by applyCustomProperty id != CSSPropertyCustom /Volumes/Data/worker/macOS-Sequoia-Debug-Build-EWS/build/Source/WebCore/style/StyleBuilder.cpp(308) : void WebCore::Style::Builder::applyProperty(CSSPropertyID, CSSValue &, SelectorChecker::LinkMatchMask, CascadeLevel) 1 0x3071730c8 WebCore::Style::Builder::applyProperty(WebCore::CSSPropertyID, WebCore::CSSValue&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel) 2 0x307172fe0 WebCore::Style::Builder::applyRollbackCascadeProperty(WebCore::Style::PropertyCascade::Property const&, WebCore::SelectorChecker::LinkMatchMask) 3 0x3071b7328 WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_0::operator()(WebCore::CSSWideKeyword&&) const 4 0x3071b6f0c decltype(auto) WTF::visitOneVariant<0ul, WTF::Visitor<WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_0, WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_1>, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>>(WTF::Visitor<WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_0, WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_1>&&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&) 5 0x3071742e8 decltype(visitOneVariant(makeVisitor(std::forward<WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_0>(fp0), std::forward<WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_1>(fp0)), asVariant(std::forward<std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>>(fp)))) WTF::switchOn<std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>, WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_0, WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_1>(std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_0&&, WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel)::$_1&&) 6 0x307172e2c WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&, std::__1::variant<WTF::Ref<WebCore::Style::CustomProperty const, WTF::RawPtrTraits<WebCore::Style::CustomProperty const>, WTF::DefaultRefDerefTraits<WebCore::Style::CustomProperty const>>, WebCore::CSSWideKeyword>&&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel) 7 0x307172440 WebCore::Style::Builder::applyCustomPropertyImpl(WTF::AtomString const&, WebCore::Style::PropertyCascade::Property const&) 8 0x3071725f0 WebCore::Style::Builder::applyCustomProperty(WTF::AtomString const&) 9 0x3044cf3ec WebCore::propertyValueForVariableName(WTF::AtomString const&, WebCore::CSSValueID, WebCore::Style::BuilderState&) 10 0x3044cf668 WebCore::CSSVariableReferenceValue::tryResolveSimpleReference(WebCore::Style::BuilderState&) const 11 0x30445c40c bool WebCore::CSSVariableReferenceValue::resolveAndCacheValue<WebCore::CSSPendingSubstitutionValue::resolveValue(WebCore::Style::BuilderState&, WebCore::CSSPropertyID) const::$_0>(WebCore::Style::BuilderState&, WebCore::CSSPendingSubstitutionValue::resolveValue(WebCore::Style::BuilderState&, WebCore::CSSPropertyID) const::$_0 const&) const 12 0x30445c320 WebCore::CSSPendingSubstitutionValue::resolveValue(WebCore::Style::BuilderState&, WebCore::CSSPropertyID) const 13 0x307174358 WebCore::Style::Builder::resolveVariableReferences(WebCore::CSSPropertyID, WebCore::CSSValue&)::$_0::operator()() const 14 0x307173738 WebCore::Style::Builder::resolveVariableReferences(WebCore::CSSPropertyID, WebCore::CSSValue&) 15 0x3071730e8 WebCore::Style::Builder::applyProperty(WebCore::CSSPropertyID, WebCore::CSSValue&, WebCore::SelectorChecker::LinkMatchMask, WebCore::Style::CascadeLevel) 16 0x307191fd4 WebCore::Style::Builder::applyCascadeProperty(WebCore::Style::PropertyCascade::Property const&)::'lambda'(WebCore::SelectorChecker::LinkMatchMask)::operator()(WebCore::SelectorChecker::LinkMatchMask) const 17 0x307171eb8 WebCore::Style::Builder::applyCascadeProperty(WebCore::Style::PropertyCascade::Property const&) 18 0x3071b62ec void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long)::operator()(unsigned long) const 19 0x3071b64d0 void WTF::forEachSetBit<unsigned long long, void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long)>(std::__1::span<unsigned long long const, 18446744073709551615ul>, unsigned long, void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long) const&)::'lambda'(unsigned long long, unsigned long)::operator()(unsigned long long, unsigned long) const 20 0x3071b63cc void WTF::forEachSetBit<unsigned long long, void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long)>(std::__1::span<unsigned long long const, 18446744073709551615ul>, unsigned long, void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long) const&) 21 0x3071b6218 void WTF::BitSet<382ul, unsigned long long>::forEachSetBit<void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long)>(unsigned long, void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int)::'lambda'(unsigned long) const&) const 22 0x307172080 void WebCore::Style::Builder::applyPropertiesImpl<(WebCore::Style::Builder::CustomPropertyCycleTracking)0>(int, int) 23 0x307171b04 WebCore::Style::Builder::applyProperties(int, int) 24 0x3071719c4 WebCore::Style::Builder::applyNonHighPriorityProperties() 25 0x3071e31d4 WebCore::Style::Resolver::applyMatchedProperties(WebCore::Style::Resolver::State&, WebCore::Style::MatchResult const&, WebCore::Style::PropertyCascade::IncludedProperties&&) 26 0x3071e2c54 WebCore::Style::Resolver::unadjustedStyleForElement(WebCore::Element&, WebCore::Style::ResolutionContext const&, WebCore::RuleMatchingBehavior) 27 0x3071f2974 WebCore::Style::TreeResolver::styleForStyleable(WebCore::Styleable const&, WebCore::Style::TreeResolver::ResolutionType, WebCore::Style::ResolutionContext const&, WebCore::RenderStyle const*)::$_0::operator()() const 28 0x3071f20e8 WebCore::Style::TreeResolver::styleForStyleable(WebCore::Styleable const&, WebCore::Style::TreeResolver::ResolutionType, WebCore::Style::ResolutionContext const&, WebCore::RenderStyle const*) 29 0x3071f2f20 WebCore::Style::TreeResolver::resolveElement(WebCore::Element&, WebCore::RenderStyle const*, WebCore::Style::TreeResolver::ResolutionType) 30 0x3071f8428 WebCore::Style::TreeResolver::resolveComposedTree() 31 0x3071f9ab4 WebCore::Style::TreeResolver::resolve() com.apple.WebKit.WebContent.Development terminated (pid 12303) for reason: crash LEAK: 1 WebPageProxy Just raising so we can fix it. Thanks! 2125375 1 webkit-bug-importer 2025-06-23 17:22:13 -0700 <rdar://problem/154140335> 2127276 2 koivisto 2025-07-02 05:56:27 -0700 *** This bug has been marked as a duplicate of bug 294585 ***