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    Bug 
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    Resolution: Incomplete
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     Not Evaluated Not Evaluated
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    None
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    6.5, 6.6
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    None
The simpleclient example did compile but obviously it has threading issues inside under Qt/msvc.{}
{{Here is the output. }}
20:55:53: Starting D:\github.com\qtmqtt\examples\mqtt\build-simpleclient-Desktop_Qt_6_6_0_MSVC2019_64bit-Debug\simplemqttclient.exe...
qt.core.qobject.connect: QObject::connect(QObject, Unknown): invalid nullptr parameter
QObject: Cannot create children for a parent that is in a different thread.
(Parent is MainWindow(0x8958ffb18), parent's thread is QThread(0x146ae4f96b0), current thread is QThread(0x146b2792a40)
qt.core.qobject.connect: QObject::connect(QObject, QThreadPool): invalid nullptr parameter
qt.core.qobject.connect: QObject::connect(QObject, Unknown): invalid nullptr parameter 
BTW, the code works well under Qt/MingW_GCC/Windows and Qt/Gcc/Linux.{}