QML Menu creation gives warning: Menu.qml:149: TypeError: Cannot read property '__contentItem' of null

Creating a qml Menu dynamically , always gives console warning.
Please find the test application as attached.
Steps followed,

• For Building used Qt5.5.1 MSVC2013 64bit
• Application has one QML window and mousearea filled to it.
• On MouseArea doubleClicked , creating custom menu using Utility.createCustomMenu() method
  -Menu will be launched
  -check the console / application logs

output observed :

Starting E:\Qt\sampleapps\testQMLMenu\debug\testQMLMenu.exe...
QML debugging is enabled. Only use this in a safe environment.
file:///E:/Qt/Qt5.5.1/5.5/msvc2013_64/qml/QtQuick/Controls/Menu.qml:149: TypeError: Cannot read property '__contentItem' of null
qml: about to hide
qml: cut menu clicked