REG(5.9): Properties of type "var" display garbage when bound to a call to qsTr

import QtQuick 2.0
import QtQuick.Window 2.2

Window
{
    width: 300
    height: 300
    visible: true

    property var str1: qsTr("some text")
    property string str2: qsTr("some text")
    property var str3: "some text"

    Column
    {
        Text {text: str1}
        Text {text: str2}
        Text {text: str3}
    }
}

#include <QApplication>
#include <QQmlApplicationEngine>

int main(int argc, char** argv)
{
    QApplication application(argc, argv);
    QQmlApplicationEngine engine;
    engine.load(QUrl("qrc:/MainWindow.qml"));
    return application.exec();
}