availableDataRates -> crash and/or wrong values

LinuxSysAccelerometer::LinuxSysAccelerometer(QSensor *sensor)
    : QSensorBackend(sensor)
    , m_timerid(0)
    , path(QString())
    , divisor(0)
    , delimiter(QString())
{
    setReading<QAccelerometerReading>(&m_reading);
    addDataRate(1, 100); // 100Hz

    Accelerometer {
        id : acc1
        active: true

        Component.onCompleted: {
            console.log(acc1.availableDataRates[0].minimum) // 100 - should be 1
            console.log(acc1.availableDataRates[0].maximum) // 100
            console.log(acc1.availableDataRates.length) // crash
        }
    }