[Webkit-unassigned] [Bug 187834] New: ASSERTION FAILED: index == m_currentFrame && !m_currentFrame in WebCore::BitmapImage::imageFrameAvailableAtIndex

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187834

            Bug ID: 187834
           Summary: ASSERTION FAILED: index == m_currentFrame &&
                    !m_currentFrame in
                    WebCore::BitmapImage::imageFrameAvailableAtIndex
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com

Created attachment 345408

  --> https://bugs.webkit.org/attachment.cgi?id=345408&action=review

Crash log

This flaky assertion failure is seen on High Sierra and Sierra Debug WK1 bots with layout test fast/images/animated-image-mp4-crash.html:

ASSERTION FAILED: index == m_currentFrame && !m_currentFrame
./platform/graphics/BitmapImage.cpp(590) : void WebCore::BitmapImage::imageFrameAvailableAtIndex(size_t)
1   0x108ef7099 WTFCrash
2   0x114edf738 WebCore::BitmapImage::imageFrameAvailableAtIndex(unsigned long)
3   0x114f7d447 WebCore::ImageSource::cacheNativeImageAtIndexAsync(WTF::RetainPtr<CGImage*>&&, unsigned long, WebCore::SubsamplingLevel, WebCore::DecodingOptions const&, WebCore::DecodingStatus)
4   0x114f892a1 WebCore::ImageSource::startAsyncDecodingQueue()::$_0::operator()() const::'lambda'()::operator()()
5   0x114f88de9 WTF::Function<void ()>::CallableWrapper<WebCore::ImageSource::startAsyncDecodingQueue()::$_0::operator()() const::'lambda'()>::call()
6   0x108f1c26b WTF::Function<void ()>::operator()() const
7   0x108f48a0b WTF::dispatchFunctionsFromMainThread()
8   0x108f4b5f5 -[JSWTFMainThreadCaller call]
9   0x7fff505bd2b5 __NSThreadPerformPerform
10  0x7fff4e489d81 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
11  0x7fff4e54165c __CFRunLoopDoSource0
12  0x7fff4e46cd30 __CFRunLoopDoSources0
13  0x7fff4e46c1ad __CFRunLoopRun
14  0x7fff4e46ba07 CFRunLoopRunSpecific
15  0x106c0235b runTest(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)
16  0x106c00621 runTestingServerLoop()
17  0x106bffade dumpRenderTree(int, char const**)
18  0x106c02d6f DumpRenderTreeMain(int, char const**)
19  0x106c8b342 main
20  0x7fff76810015 start
21  0x2

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fimages%2Fanimated-image-mp4-crash.html

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