Cannot make a list the default property

import QtQuick 1.0
Rectangle {
    width: 100; height: 100
    Foo {
        bar: [
            Item { objectName: "Item A" },
            Item { objectName: "Item B" }
        ]
    }
}

import QtQuick 1.0

QtObject {
    property list<Item> bar: [
        Item { objectName: "Item 1" },
        Item { objectName: "Item 2" },
        Item { objectName: "Item 3" }
    ]

    Component.onCompleted: {
        for(var i = 0; i < bar.length; i++) {
            print("bar: " + bar[i].objectName);
        }
    }
}

import QtQuick 1.0
Rectangle {
    width: 100; height: 100
    Foo {
        Item { objectName: "Item A" }
        Item { objectName: "Item B" }
    }
}

import QtQuick 1.0

QtObject {
    default property list<Item> bar: [
        Item { objectName: "Item 1" },
        Item { objectName: "Item 2" },
        Item { objectName: "Item 3" }
    ]

    Component.onCompleted: {
        for(var i = 0; i < bar.length; i++) {
            print("bar: " + bar[i].objectName);
        }
    }
}