Deadlock when CancelIoEx fails?

I am getting a deadlock at my app's destruction.

Call Stack is
  ntdll.dll!ZwDelayExecution() Unknown
KernelBase.dll!SleepEx() Unknown
> Qt5Cored.dll!QWindowsPipeReader::waitForNotification(int timeout) Line 300 C++
Qt5Cored.dll!QWindowsPipeReader::stop() Line 116 C++
Qt5Networkd.dll!QLocalSocketPrivate::_q_pipeClosed() Line 253 C++
Qt5Networkd.dll!QLocalSocket::close() Line 300 C++
Qt5Networkd.dll!QLocalSocket::~QLocalSocket() Line 358 C++
rt_debug.exe!QLocalSocket::`scalar deleting destructor'(unsigned int) C++
Qt5Cored.dll!QObjectPrivate::deleteChildren() Line 1963 C++
Qt5Cored.dll!QObject::~QObject() Line 1034 C++
rt_debug.exe!KrConnection::~KrConnection() Line 52 C++
rt_debug.exe!KrConnection::`scalar deleting destructor'(unsigned int) C++
rt_debug.exe!KrApplication::_stopConnection() Line 362 C++
rt_debug.exe!KrApplication::~KrApplication() Line 174 C++
rt_debug.exe!main(int argCount, char * * argValues) Line 58 C++
rt_debug.exe!WinMain(HINSTANCE__ * _formal, HINSTANCE_ * __formal, char * __formal, int __formal) Line 113 C++
rt_debug.exe!invoke_main() Line 99 C++
rt_debug.exe!__scrt_common_main_seh() Line 253 C++
rt_debug.exe!__scrt_common_main() Line 296 C++
rt_debug.exe!WinMainCRTStartup() Line 17 C++
kernel32.dll!BaseThreadInitThunk() Unknown
ntdll.dll!RtlUserThreadStart() Unknown

WaitForNotification (-1) triggers an infinite sleep, and i assume no notificaion ever comes
qt_cancelIo() called earlier in stop() failed with error ERROR_NOT_FOUND

Some fork of qt made a modification 4 years ago ( https://git.merproject.org/mer-core/qtbase/commit/17869a544e2a3b2cdc61dfe87a96a8c1a3286fff ) saying that if cancelIo fails, then there will not be a notification. So the wait should be conditioned by the success of cancelIo

Wouldn't that be a valid fix to integrate ?