//Definition of map
QMap<int, ZoneData*>           mapId2Pointer_;

//Some values filled in mapId2Pointer_ here...

        QMapIterator<int, ZoneData*> iteratorId2Pointer(mapId2Pointer_);
        while (iteratorId2Pointer.hasNext())
        {
            iteratorId2Pointer.next();
            if (iteratorId2Pointer.value() == _climbZoneData)
            {
                iteratorId2Pointer = mapId2Pointer_.erase(iteratorId2Pointer); //<- ERROR
            }
        }