[Webkit-unassigned] [Bug 190747] [WinCairo] ASSERTION FAILED: !m_preparingToPlay in MediaPlayerPrivateMediaFoundation::prepareToPlay

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190747

--- Comment #3 from Fujii Hironori <Hironori.Fujii at sony.com> ---
MediaPlayerPrivateMediaFoundation::prepareToPlay is called from HTMLMediaElement::prepareToPlay first.

> WebKit.dll!WebCore::MediaPlayerPrivateMediaFoundation::prepareToPlay() Line 193	C++
> WebKit.dll!WebCore::MediaPlayer::prepareToPlay() Line 554	C++
> WebKit.dll!WebCore::HTMLMediaElement::prepareToPlay() Line 2958	C++
> WebKit.dll!WebCore::HTMLMediaElement::load::<unnamed-tag>::operator()() Line 1183	C++
> WebKit.dll!WTF::Detail::CallableWrapper<`lambda at ..\..\Source\WebCore\html/HTMLMediaElement.cpp:1181:46',void>::call() Line 52	C++
> WebKit.dll!WTF::Function<void ()>::operator()() Line 79	C++
> WebKit.dll!WebCore::GenericTaskQueue<WebCore::Timer,unsigned int>::enqueueTask::<unnamed-tag>::operator()() Line 107	C++
> WebKit.dll!WTF::Detail::CallableWrapper<`lambda at ..\..\Source\WebCore\platform\GenericTaskQueue.h:101:31',void>::call() Line 52	C++
> WebKit.dll!WTF::Function<void ()>::operator()() Line 79	C++
> WebKit.dll!WebCore::TaskDispatcher<WebCore::Timer>::dispatchOneTask() Line 111	C++
> WebKit.dll!WebCore::TaskDispatcher<WebCore::Timer>::sharedTimerFired() Line 86	C++
> WebKit.dll!WebCore::TaskDispatcher<WebCore::Timer>::sharedTimer::<unnamed-tag>::operator()() Line 60	C++
> WebKit.dll!WTF::Detail::CallableWrapper<`lambda at ..\..\Source\WebCore\platform/GenericTaskQueue.cpp:60:40',void>::call() Line 52	C++
> WebKit.dll!WTF::Function<void ()>::operator()() Line 79	C++
> WebKit.dll!WebCore::Timer::fired() Line 127	C++
> WebKit.dll!WebCore::ThreadTimers::sharedTimerFiredInternal() Line 129	C++
> WebKit.dll!WebCore::ThreadTimers::setSharedTimer::<unnamed-tag>::operator()() Line 69	C++
> WebKit.dll!WTF::Detail::CallableWrapper<`lambda at ..\..\Source\WebCore\platform/ThreadTimers.cpp:69:41',void>::call() Line 52	C++
> WebKit.dll!WTF::Function<void ()>::operator()() Line 79	C++
> WebKit.dll!WebCore::MainThreadSharedTimer::fired() Line 84	C++
> WebKit.dll!WebCore::TimerWindowWndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 89	C++
> [External Code]	
> WebKit.dll!WebKitMessageLoop::run(HACCEL__ * hAccelTable) Line 94	C++
> MiniBrowserLib.dll!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpstrCmdLine, int nCmdShow) Line 97	C++
> MiniBrowserLib.dll!dllLauncherEntryPoint(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpstrCmdLine, int nCmdShow) Line 115	C++
> MiniBrowser.exe!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpstrCmdLine, int nCmdShow) Line 232	C++
> [External Code]	

And, called from onTopologySet next, and the assertion fails.

> WebKit.dll!WebCore::MediaPlayerPrivateMediaFoundation::prepareToPlay() Line 193	C++
> WebKit.dll!WebCore::MediaPlayerPrivateMediaFoundation::onTopologySet() Line 917	C++
> WebKit.dll!WebCore::MediaPlayerPrivateMediaFoundation::endGetEvent::<unnamed-tag>::operator()() Line 531	C++
> WebKit.dll!WTF::Detail::CallableWrapper<`lambda at ..\..\Source\WebCore\platform\graphics\win\MediaPlayerPrivateMediaFoundation.cpp:527:26',void>::call() Line 52	C++
> WTF.dll!WTF::Function<void ()>::operator()() Line 79	C++
> WTF.dll!WTF::dispatchFunctionsFromMainThread() Line 113	C++
> WTF.dll!WTF::ThreadingWindowWndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 48	C++
> [External Code]	
> WebKit.dll!WebKitMessageLoop::run(HACCEL__ * hAccelTable) Line 94	C++
> MiniBrowserLib.dll!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpstrCmdLine, int nCmdShow) Line 97	C++
> MiniBrowserLib.dll!dllLauncherEntryPoint(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpstrCmdLine, int nCmdShow) Line 115	C++
> MiniBrowser.exe!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpstrCmdLine, int nCmdShow) Line 232	C++
> [External Code]

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