ListView.contentHeight does not include header and footer item heights

import QtQuick 2.0

Item {
    width: 200
    height: 400
    ListView {
        id: list
        anchors.fill: parent

        Component.onCompleted: console.log("contentHeight: " + contentHeight)
        onContentHeightChanged: console.log("contentHeight: " + contentHeight)

        model: 1
        footer: Rectangle {
            width: list.width
            height: 50
            color: "red"
            border.width: 1
            border.color: "black"
        }
        delegate: Rectangle {
            width: list.width
            height: 50
            color: "blue"
            border.width: 1
            border.color: "black"
        }
        header: Rectangle {
            width: list.width
            height: 50
            color: "green"
            border.width: 1
            border.color: "black"
        }
    }
}