REG [5.3.2-5.4.1] Opening external url from Menu causes crash

import QtQuick 2.0
import QtQuick.Controls 1.2

ApplicationWindow {
   title: qsTr("OpenFromMenuFails")
   width: 640
   height: 480
   visible: true

   Text {
      text: "Right-click for pop-up menu and press Open!"
      anchors.centerIn: parent
   }

   MouseArea {
      id: ma
      anchors.fill: parent
      onClicked: menuContext.popup()
      acceptedButtons: Qt.RightButton
   }

   Menu {
      id: menuContext

      MenuItem {
         text: qsTr("&Open")
         onTriggered: Qt.openUrlExternally("http://www.qt.io/")
      }
   }
}