[Webkit-unassigned] [Bug 164913] New: Crash in WebCore::Animation::animationsMatch

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164913

            Bug ID: 164913
           Summary: Crash in WebCore::Animation::animationsMatch
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com
                CC: bugs-noreply at webkitgtk.org, simon.fraser at apple.com

I hit this crash when loading Epiphany's new tab page yesterday. We have 24 reports of it:

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 WebCore::Animation::animationsMatch at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/platform/animation/Animation.cpp:138
 #1 WebCore::Animation::operator== at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/platform/animation/Animation.h:168
 #2 WebCore::Animation::operator!= at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/platform/animation/Animation.h:169
 #3 WebCore::AnimationList::operator== at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/platform/animation/AnimationList.cpp:59
 #4 WTF::arePointingToEqualData<std::unique_ptr<WebCore::AnimationList, std::default_delete<WebCore::AnimationList> > > at /usr/src/debug/webkitgtk-2.14.1/Source/WTF/wtf/PointerComparison.h:33
 #5 WebCore::StyleRareNonInheritedData::operator== at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/rendering/style/StyleRareNonInheritedData.cpp:258
 #6 WebCore::DataRef<WebCore::StyleRareNonInheritedData>::operator== at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/rendering/style/DataRef.h:51
 #7 WebCore::RenderStyle::operator== at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/rendering/style/RenderStyle.cpp:305
 #8 WebCore::RenderStyle::operator!= at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/rendering/style/RenderStyle.h:549
 #9 WebCore::Style::determineChange at /usr/src/debug/webkitgtk-2.14.1/Source/WebCore/style/StyleChange.cpp:63

There is a detailed backtrace attached to comment #1 in the downstream bug.

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