Quick Combobox crash in listview if located outside the view

import QtQuick 2.2
import QtQuick.Layouts 1.1
import QtQuick.Controls 1.1

ApplicationWindow {
    title: qsTr("Hello World")
    width: 200
    height: 59 // CRASH if height < combobox model count * combobox height
//    height: 60 // NO CRASH

    ListView {
        anchors.fill: parent
        model: ["aa","bb","cc","dd"]
        delegate: ComboBox {
            height: 20
            model: ["AA","BB"] // CRASH if window height < 60
        //    model: ["AA"] // no CRASH at all
        }
    }
}