python app crashes when using qt4-qtconfig

[axel]

When I use qt4-qtconfig to set qtcurve as theme phython app Anki crashes or hangs. It happens for example when I click on File menu or Close button, etc.

I described it also on Anki support forum
https://anki.tenderapp.com/discussions/ankidesktop/14722-anki-crashes-on-linux

On this forum they claim it is qtcurve problem but other applications that use qtcurve don't crash nor hang. So I suspect it is caused by qt4-qtconfig.

report:
http://pastebin.com/B85PP9sA

I uninstalled qt4-qtconfig and there was no problem with Anki, no crashes or hangs, but without it I can't use this theme engine for all applications, for example without it Anki and also Kate uses Oxygen even when in KDE setting there is qtcurve style chosen.

[axel (axel334)]

I forgot to give details. It happens on Kubuntu 14.04 64-bit. Anki 2.0.32
Qt 4.8.6 PyQt 4.10.4

[axel (axel334)]

Discussion
https://anki.tenderapp.com/discussions/ankidesktop/18360-anki-keeps-crashing-on-kubuntu-1604

bug report on qt bugs
https://bugreports.qt.io/browse/QTBUG-53592