[PyQt] internalPointer crashes

[Erik Janssens]

what is a crash in PyQt can be a memleak in PySide ;)

On Fri, 2011-08-26 at 14:12 -0400, Joel B. Mohler wrote:
> Hi,
> 
> Back in April of this year Jeremy Sanders reported crashes when storing a 
> python object in QModelIndex internalPointer.  I've had crashes of this nature 
> as well.  It seems to work the vast majority of the time but I now have a case 
> that seems to consistently crash although not always with the same error.
> 
> Jeremy's report is at http://www.riverbankcomputing.com/pipermail/pyqt/2011-
> April/029719.html .  The suggestion in replies there was to make sure that 
> python had pointers to all the things in internalPointer -- I'm quite certain 
> that my python object structure does in fact have live references so I think 
> there is an additional bug (although maintaining live python references seems 
> quite sensible to me).
> 
> I'm currently on ubuntu 11.04 with PyQt 4.8.3 and Qt 4.7.2.  I think this same 
> crash is happening on windows vista (with Qt versions I don't have at the 
> moment).  My model source is at 
> https://bitbucket.org/jbmohler/qtalchemy/src/69e8f006fee2/qtalchemy/PyQtModels.py 
> in the class PBTableModel.  I'd have to work a bit to prune this down to 
> something self-complete.
> 
> Of additional note is that converting everything in sight to PySide results in 
> a non-crashing application.  I'm hesitant to rush off to PySide on the basis 
> of this bug, but it's tempting.
> 
> Joel
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