Regression: RegExp in QML returns ‘undefined’

import QtQuick 2.0

Item
{
    width: 360
    height: 360

    Component.onCompleted:
    {
       console.debug(text.text);
    }

    Text
    {
       id: text
       text: regExpTest("Text1.TextOld", ".TextNew");
       anchors.centerIn: parent
    }

    function regExpTest(orgText, replaceText)
    {
       var result = "";
       var test =/(Text1)\..*$/;

       var matchResult = orgText.match(test)
       if (matchResult !== null)
       {
          result = RegExp.$1 + replaceText;
       }

       return result;
    }
}