QBluetoothDeviceDiscoveryAgent::stop() accesses NULL pointer

Calling stop() on discovery agent leads to error ""QCoreApplication::postEvent: Unexpected null receiver". Looking at the code, I'm even surprised this does not crash.

 

This is due to code bluetooth\qbluetoothdevicediscoveryagent_winrt.cpp:

void QBluetoothDeviceDiscoveryAgentPrivate::stop()
{
    Q_Q(QBluetoothDeviceDiscoveryAgent);
  if (worker)

{     worker->stop();     disconnectAndClearWorker();     emit q->canceled();   }

  if (leScanTimer)

{     leScanTimer->stop();     worker->deleteLater();   }

}

worker->deleteLater() is called even if disconnectAndClearWorker() was invoked. Then worker is NULL and should not be "deleted later".

 

I'm seeing this using Win10 on a laptop.