[Reg 6.2 -> 6.3] qsTr with %n can cause error "Unable to assign [undefined] to QString" if qml added with qt_add_qml_module

import QtQuick
import QtQuick.Controls
import msg

Window {
    id: win
    width: 640
    height: 480
    visible: true
    title: qsTr('Hello world')

    readonly property int count: 50

    Column {
        anchors.fill: parent

        Label {
            text: qsTr('%1 message(s)', 'dashboard').arg(win.count)
            height: 50
        }

        Label { //This does not work
            text: qsTr('%n message(s)', 'dashboard', win.count)
            height: 50
        }

        Label {
            text: qsTr('%n message(s)', 'dashboard', 50)
            height: 50
        }

        Label {
            text: qsTr('%n message(s)', 'dashboard', Message.count)
            height: 50
        }
    }
}