REGRESSION(250571@main)[WinCairo] "Exception thrown: read access violation. " in WTF::Thread::ThreadHolder::~ThreadHolder() If I run WinCairo WK1 and WK2 with debugger attached, the following exception is thrown by browsing some sites. Exception thrown: read access violation. **_Val** was 0x188. Callstack WTF.dll!std::exchange<WTF::Thread::ClientData *,std::nullptr_t &>(WTF::Thread::ClientData * & _Val, void * & _New_val) Line 616 C++ WTF.dll!WTF::RawPtrTraits<WTF::Thread::ClientData>::exchange<std::nullptr_t>(WTF::Thread::ClientData * & ptr, void * && newValue) Line 41 C++ WTF.dll!WTF::RefPtr<WTF::Thread::ClientData,WTF::RawPtrTraits<WTF::Thread::ClientData>,WTF::DefaultRefDerefTraits<WTF::Thread::ClientData>>::operator=(void * __formal) Line 163 C++ WTF.dll!WTF::Thread::ThreadHolder::~ThreadHolder() Line 273 C++ WTF.dll!WTF::`dynamic atexit destructor for 's_threadHolder''() C++ WTF.dll!__dyn_tls_dtor(void * __formal, const unsigned long dwReason, void * __formal) Line 119 C++ ntdll.dll!LdrpCallInitRoutine() Unknown ntdll.dll!LdrpCallTlsInitializers() Unknown ntdll.dll!LdrShutdownThread() Unknown ntdll.dll!RtlExitUserThread() Unknown KernelBase.dll!FreeLibraryAndExitThread() Unknown ucrtbase.dll!common_end_thread() Unknown ucrtbase.dll!thread_start<unsigned int (__cdecl*)(void *),1>() Unknown kernel32.dll!BaseThreadInitThunk() Unknown ntdll.dll!RtlUserThreadStart() Unknown
Since 250571@main (Bug 240116).
I tested with AppleWin Release 250571@main, and confirmed it also has this bug. https://build.webkit.org/#/builders/67/builds/11801 https://s3-us-west-2.amazonaws.com/archives.webkit.org/win-x86_64-release/250571@main.zip I need to run MiniBrowser.exe with debugger atttached > devenv -debugexe MiniBrowser.exe If I run MiniBrowser.exe without debugger, it runs almost no problem. The mouse cursor was indicating busy. Task Manager is showing Windows Problem Reporting process is spawn.
Pull request: https://github.com/WebKit/WebKit/pull/823
Committed r294539 (250794@main): <https://commits.webkit.org/250794@main> Reviewed commits have been landed. Closing PR #823 and removing active labels.