[Webkit-unassigned] [Bug 246844] REGRESSION(cairo 1.17.6)[WinCairo] rendering glitches of twitter.com and yahoo.co.jp

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=246844

--- Comment #9 from Fujii Hironori <Hironori.Fujii at sony.com> ---
cairo_surface_destroy is called in ImageDecoder thread.

Here is the callstack (taken by WinCairo WK1):

> WebKit.dll!WTF::DefaultRefDerefTraits<_cairo_surface>::derefIfNotNull(_cairo_surface * ptr) Line 52	C++
> WebKit.dll!WTF::RefPtr<_cairo_surface,WTF::RawPtrTraits<_cairo_surface>,WTF::DefaultRefDerefTraits<_cairo_surface>>::~RefPtr<_cairo_surface,WTF::RawPtrTraits<_cairo_surface>,WTF::DefaultRefDerefTraits<_cairo_surface>>() Line 74	C++
> WebKit.dll!WebCore::ImageBackingStore::image() Line 44	C++
> WebKit.dll!WebCore::ScalableImageDecoder::createFrameImageAtIndex(unsigned __int64 index, WebCore::SubsamplingLevel __formal, const WebCore::DecodingOptions & __formal) Line 275	C++
> WebKit.dll!WebCore::ImageSource::startAsyncDecodingQueue::__l2::<lambda_1>::operator()() Line 364	C++
> WebKit.dll!WTF::Detail::CallableWrapper<`WebCore::ImageSource::startAsyncDecodingQueue'::`2'::<lambda_1>,void>::call() Line 53	C++
> WTF.dll!WTF::Function<void __cdecl(void)>::operator()() Line 83	C++
> WTF.dll!WTF::WorkQueueBase::dispatch::__l2::<lambda_1>::operator()() Line 70	C++
> WTF.dll!WTF::Detail::CallableWrapper<`WTF::WorkQueueBase::dispatch'::`2'::<lambda_1>,void>::call() Line 53	C++
> WTF.dll!WTF::Function<void __cdecl(void)>::operator()() Line 83	C++
> WTF.dll!WTF::RunLoop::performWork() Line 147	C++
> WTF.dll!WTF::RunLoop::wndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 57	C++
> WTF.dll!WTF::RunLoop::RunLoopWndProc(HWND__ * hWnd, unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 39	C++
> [External Code]	
> WTF.dll!WTF::RunLoop::run() Line 74	C++
> WTF.dll!WTF::RunLoop::create::__l2::<lambda_1>::operator()() Line 114	C++
> WTF.dll!WTF::Detail::CallableWrapper<`WTF::RunLoop::create'::`2'::<lambda_1>,void>::call() Line 53	C++
> WTF.dll!WTF::Function<void __cdecl(void)>::operator()() Line 83	C++
> WTF.dll!WTF::Thread::entryPoint(WTF::Thread::NewThreadContext * newThreadContext) Line 251	C++
> WTF.dll!WTF::wtfThreadEntryPoint(void * data) Line 151	C++
> [External Code]

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