When I put a ComboBox in a Listviews delegate and the listview grows beyond the size of the parented item the applications crashes

import QtQuick 2.2
import QtQuick.Controls 1.1

ApplicationWindow {
    visible: true
    width: 640
    height: 180
    title: qsTr("Test window")

    Rectangle {
        width: 360
        height: 140


        ListModel {
            id: amodel

            ListElement {
                name: "one"
            }
            ListElement {
                name: "two"
            }
            ListElement {
                name: "three"
            }
            ListElement {
                name: "four"
            }
            ListElement {
                name: "five"
            }
            ListElement {
                name: "six"
            }
            ListElement {
                name: "seven"
            }
            ListElement {
                name: "eight"
            }
            ListElement {
                name: "nine"
            }
            ListElement {
                name: "ten"
            }

        }

        ListView {
            anchors.fill: parent
            model : amodel
            delegate:
                Item  {
                width : 100
                height : 20
                Text{
                    anchors.fill: parent
                    text : name
                }
                ComboBox {
                    height : 18
                    width : 150
                    anchors.verticalCenter: parent.verticalCenter
                    model : ["do", "I", "crash"]
                }
            }
        }

    }
}