Errors when using "parent" within a (removed) Item in a Repeater

import QtQuick 2.0

Item {
    width: 400
    height: 400

    Row {
        anchors.bottom: parent.bottom
        anchors.horizontalCenter: parent.horizontalCenter
        spacing: 2

        Repeater {
            id: repeater
            model: 10
            Rectangle {
                color: "green"
                width: 10; height: 50
                anchors.bottom: parent.bottom
            }
        }
    }

    MouseArea {
        anchors.fill: parent
        onClicked: repeater.model = 0
    }
}

QmlTesting.qml:18: TypeError: Cannot read property of null