crash/missing update of position after dialog "Improve location accuracy" appears

On many smartphones the dialog "Improve location accuracy" always appears after activating the location (mostly after deleting the data/cache of the google services app). If this is the case then the QGeoPositionInfoSource does not update the new position and QGeoPositionInfoSource leads to a crash after quit().

1. start app
2. activate the location
3. agree/deny to the dialog "Improve location accuracy"
-> position is not updated
4. quit the app via QGuiApplication::instance()->quit()
-> App crashes dialog appears

SPos::SPos(QObject *parent) : QObject(parent)
{
// Position
m_pQGpis = QGeoPositionInfoSource::createDefaultSource(this);
if (m_pQGpis)

{ m_pQGpis->setPreferredPositioningMethods(QGeoPositionInfoSource::AllPositioningMethods); m_pQGpis->setUpdateInterval(1000); m_pQGpis->startUpdates(); }

// Satellite
m_pQGsis = QGeoSatelliteInfoSource::createDefaultSource(this);
if (m_pQGsis)

{ m_pQGsis->setUpdateInterval(1000); m_pQGsis->startUpdates(); }

}

// place somewhere in the code
QGuiApplication::instance()->quit();

// error
W libapp.so: (null):0 ((null)): exit app 0
F libapp.so: (null):0 ((null)): satelliteUpdated: source == 0
F libc : Fatal signal 6 (SIGABRT), code -6 in tid 3670 (Thread-6)