REGRESSION: Assertions in SimpleLineLayout::FlowContents::segmentIndexForPositionSlow on editing/selection/home-end.html

• Component: Layout and Rendering
• Status: RESOLVED DUPLICATE

[Alexey Proskuryakov]

editing/selection/home-end.html has started to frequently crash with an assertion today:

https://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=editing%2Fselection%2Fhome-end.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore      	0x0000000105dc0b5a WTFCrash + 42 (Assertions.cpp:321)
1   com.apple.WebCore             	0x000000010bacb218 WebCore::SimpleLineLayout::FlowContents::segmentIndexForPositionSlow(unsigned int) const + 152 (SimpleLineLayoutFlowContents.cpp:59)
2   com.apple.WebCore             	0x000000010ac912a3 WebCore::SimpleLineLayout::FlowContents::segmentIndexForPosition(unsigned int) const + 99 (SimpleLineLayoutFlowContents.h:103)
3   com.apple.WebCore             	0x000000010ac90ecf WebCore::SimpleLineLayout::FlowContents::segmentForPosition(unsigned int) const + 31 (SimpleLineLayoutFlowContents.h:108)
4   com.apple.WebCore             	0x000000010b6d566e WebCore::SimpleLineLayout::TextFragmentIterator::textWidth(unsigned int, unsigned int, float) const + 622 (SimpleLineLayoutTextFragmentIterator.cpp:103)
5   com.apple.WebCore             	0x000000010b6d4f74 WebCore::SimpleLineLayout::TextFragmentIterator::nextTextFragment(float) + 484 (SimpleLineLayoutTextFragmentIterator.cpp:78)
6   com.apple.WebCore             	0x000000010b788fda WebCore::SimpleLineLayout::createLineRuns(WebCore::SimpleLineLayout::LineState&, WebCore::SimpleLineLayout::LineState const&, WTF::Vector<WebCore::SimpleLineLayout::Run, 10ul, WTF::CrashOnOverflow>&, WebCore::SimpleLineLayout::TextFragmentIterator&) + 698 (SimpleLineLayout.cpp:445)

[Alexey Proskuryakov]

Resolved via a rollout.

*** This bug has been marked as a duplicate of bug 142508 ***