Crash during v8 binding construction

import QtQuick 2.0

Item {
    id: root;
    Component {
        id: comp
        Text {
            property var value: 5
            property string str: 'some
            multiline ' + value + 'str
            ing'
        }
    }
    Component.onCompleted: comp.createObject(root,{"value" : undefined})
}