PositionSource doesn't stay active nor start on initial property values

When defining PositionSource like this:

PositionSource{
    updateInterval: 1000
    active: true
    onPositionChanged:{
        console.log("You will never see me!"); 
    }
}

It is deactivated during initial loading.

That's because QDeclarativePositionSource::setActive is called quite in the beginning and it doesn't change m_active member. It just calls QDeclarativePositionSource::executeStart() which fails because m_positionSource is not yet initialized. Thus, m_active is still not set to true. And later, when QDeclarativePositionSource::tryAttach is called, m_active is not true.