Infinite loop when undocking a QDockWiget that contains a QTabWidget which has its documentMode property set to true

I'm facing an infinite loop when undocking certain QDockWiget. After some investigations, I found out that the problematic dockwidgets were those that contain a QTabWidget which has DocumentMode = true. If I change the property DocumentMode to false, the QDockWidget works just fine, and it can be undocked without problem.

This bug might be related to a previous bug report that has not been resolved: http://bugreports.qt.nokia.com/browse/QTBUG-14365

This bug does not exist on Windows.

In order to reproduce this bug:

• unzip the attached archive test-dockwidget.zip
• build test-dockwidget.pro on Mac OS X 10.6, with Qt Cocoa binaries
• launch the application
• try to undock the dockable widget => the application should crash
  => if you set DocumentMode to false on the tabwidget contained in the dockwidget, there is no more crash