Error in CreateWindowContainer in Qt5.1.0

[alizadeh91]

Hi,
I've got problem with Qt 5.1.
After writting a huge software containing qml and cpp files with Qt5.0.0 we decided to import it into Qt5.1 so we can use CreateWindowContainer method of QWidget.
While using CreateWindowContainer(QWindow *window,...) method and adding created widget in tabWidget we got following Assert error and i don't have any idea what's going on:
debugerror.png

I've tested a simple QtQuick and embedded it in Qwidget and qtabwidget and that's ok!
note: I'm using QtQuick 2.0 and and QtGraphical Effects.

Have any one has any idea what could be the problem? and can i debug my qml to findout in which line my codes gives assert error? if so, how can i do that with cdb (I've never debug with qml)?

Thanks in Advance