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Null check document element in createGradient https://bugs.webkit.org/show_bug.cgi?id=221378 Patch by Rob Buis <rbuis@igalia.com> on 2021-02-08 Reviewed by Alex Christensen. Source/WebCore: The document element is not guaranteed to exist so null check it before determining the root style. Tests: fast/css/conic-gradient-no-document-element-crash.html fast/css/linear-gradient-no-document-element-crash.html fast/css/radial-gradient-no-document-element-crash.html * css/CSSGradientValue.cpp: (WebCore::CSSLinearGradientValue::createGradient): (WebCore::CSSRadialGradientValue::createGradient): (WebCore::CSSConicGradientValue::createGradient): LayoutTests: Add tests for this. * fast/css/conic-gradient-no-document-element-crash-expected.txt: Added. * fast/css/conic-gradient-no-document-element-crash.html: Added. * fast/css/linear-gradient-no-document-element-crash-expected.txt: Added. * fast/css/linear-gradient-no-document-element-crash.html: Added. * fast/css/radial-gradient-no-document-element-crash-expected.txt: Added. * fast/css/radial-gradient-no-document-element-crash.html: Added. Canonical link: https://commits.webkit.org/233811@main git-svn-id: https://svn.webkit.org/repository/webkit/trunk@272497 268f45cc-cd09-0410-ab3c-d52691b4dbfc
2021-02-08 17:36:18 +00:00
This test should not crash.