ContactModel crashes on startup

import QtQuick 1.1
import QtMobility.contacts 1.1

Rectangle {
    width: 360
    height: 360

    ListView {
        anchors.fill:  parent

        model: contactModel
        delegate: Text {
            text: contact.name.firstName + " " + contact.name.lastName
        }

        ContactModel {
            id: contactModel
            Component.onCompleted: {
                if (manager == "memory")
                    importContacts(Qt.resolvedUrl("example.vcf"));
            }
        }
    }
}