Popup: binding loops with size-dependent positioning

import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Controls 2.0

Window {
    id: window
    width: 360
    height: 360
    visible: true

    Popup {
        visible: true
        x: (parent.width - width) / 2
        y: (parent.height - height) / 2
        closePolicy: Popup.NoAutoClose

        Label {
            text: "Qt"
            font.pixelSize: 72
            anchors.fill: parent
        }
    }
}

qrc:/main.qml:11:5: QML Popup: Binding loop detected for property "y"
qrc:/main.qml:11:5: QML Popup: Binding loop detected for property "x"
qrc:/main.qml:11:5: QML Popup: Binding loop detected for property "y"
qrc:/main.qml:11:5: QML Popup: Binding loop detected for property "y"
qrc:/main.qml:11:5: QML Popup: Binding loop detected for property "x"
qrc:/main.qml:11:5: QML Popup: Binding loop detected for property "y"