x64dbg crashes when closed. (STATUS_FATAL_USER_CALLBACK_EXCEPTION)

[cw2k]

Well it happens not always - however if I opened the (nomodal) x64dbg-updater settings window and close x64dbg.
Boom x64dbg crashes.
0xC000041d = STATUS_FATAL_USER_CALLBACK_EXCEPTION
With Ollydbg I found out the crash is triggered by qwindows.dll that tries to call 'myMessageHandler' in the snowman LogManager which have been already unloaded.
Here are the details:

snowman/src/nc/gui/LogManager.cpp

Line 53 in 8eca8f6

qInstallMessageHandler(myMessageHandler);

void myMessageHandler(QtMsgType type, const QMessageLogContext &, const QString &msg) {
    LogManager::instance()->log(type, msg);
}
LogManager *LogManager::instance() {
 
...
        qInstallMessageHandler(myMessageHandler);
...

To fixed that issue add an destructor for LogManager that free's myMessageHandler when unloaded.