How to mess QMdiArea indexes?

[Raccoon29]

Hi,

Since my problem is too hard to explicate, I'm looking for ideas.
I'm going to request a brain-storming, I need all sort of suggestions, hints, tips, and more, then I'll try appropriated solutions.

The topic is: "How could you mess up QMdiArea indexes?"
Imagine that you have to mess up the indexes of the subwindows of a QMdiArea, in order to obtain a:
ASSERT failure in QList<T>::at: "index out of range", file ../../include/QtCore/../../src/corelib/tools/qlist.h, line 391

So, since indexes are anyway managed internally by QMdi system, how could be possible to twist this system, having an index that referse to -1 or to a number larger than the effective number of opened widgets?
Delete, removeSubWindows,WA_DeleteOnClose... everything, even the most useless idea might be usefull!
Ok, let's go.