[PyQt] Help with crash in program

[Vadim Zelenin]

Hello All,

I got a crash in my program. The situation is very similar to violation of
objects ownership and in consequence, illegal destruction of objects or
heap corruption.
Archive of the program with the bug is attached.

This program repeatedly opens and closes the dialog box. Usually crash
occurs after 300 to 1500 cycles.

This crash occurs in the windows xp, python 2.7.3, Qt 4.8.2 and PyQt 4.9.4
(from official PyQt-Py2.7-x86-gpl-4.9.4-1.exe)
Just get segfault in kubuntu (python 2.7.3, Qt 4.8.1, PyQt 4.9.1)

Please help find the bug.

Thanks,
Vadim
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