[PyQt] QMainWindow bug?

[Mailing List SVR]

Ok, in a my pyqt app (I'm still using pyqt-4.7.x), I have a dialog that
require much time to open so I keep a reference to it in a app global
variable and I use this reference to reopen the dialog after the first
time. This seems to work and the dialog open much quicker, however in
some undeterminated cases I get:

RuntimeError: underlying C/C++ object has been deleted

when I get this error I recreate the dialog and update the global
reference,

can you please explain the right way to keep a reference in python to a
qt object?

thanks
NIcola


Il giorno mer, 19/01/2011 alle 23.47 +0100, Erik Janssens ha scritto:
> there was a change in sip/pyqt from 4.8.1 to 4.8.2 regarding
> the detection of objects deleted by qt but still referenced in
> python (which is the case here).  in 4.8.1 sip/pyqt tried to
> detect this to avoid segfaults.  this detection however brought
> other issues with it, therefor the detection was turned off again
> in 4.8.2
> 
> the solution is not to keep references in python of objects
> owned by qt when they might get deleted.
> 
> On Wed, Jan 19, 2011 at 12:36 PM, Mailing List SVR
> <lists at svrinformatica.it> wrote:
> > I can confirm the segfault:
> >
> > - linux, kernel 2.6.36
> > - python 2.7.1
> > - pyqt 4.8.2
> > - qt 4.7.1
> >
> > works fine with PySide,
> >
> > Nicola
> >
> >
> > Il giorno mer, 19/01/2011 alle 08.36 +0100, Vicent Mas ha scritto:
> >> 2011/1/18 Nick Gaens <mail at nickgaens.com>:
> >> > - Win7 64bit
> >> > - Python 2.6.6 (r266:84297, Aug 24 2010, 18:46:32) [MSC v.1500 32 bit
> >> > (Intel)] on win32
> >> > - Qt v4.7.0
> >> > - PyQt GPL v4.8.1 for Python v2.6
> >> > Result: no crashes, works like a charm..
> >> >
> >>
> >> Hi,
> >>
> >> I get the crash also on Windows Vista 32bit (again Python 2.6 and PyQt 4.8.2)
> >>
> >> Vicent
> >>
> >
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