QML: mapFromItem crashes on ListView item's parent

import QtQuick 1.1

Rectangle {
    id: root

    ListView {
        anchors.fill: parent
        model: 1
        delegate: Rectangle {
            id: rect
            Component.onCompleted: {
                rect.parent.mapFromItem(root, 0, 0); // <== CRASH
                //root.parent.mapToItem(rect, 0, 0); // <== WORKS!
            }
        }
    }
}