Anki crashes hangs

[gnomek]

I use Anki for learning English.

It crashes or hangs very often.
On Anki support forum they claim it is a problem with qtcurve.
https://anki.tenderapp.com/discussio...peatedly-crash
https://anki.tenderapp.com/discussio...unresolve=true
Here are some more crash reports:
http://pastebin.com/J97dCmj6

Can anyone confirm if it is really qtcurve problem? I'd prefer not to change system version because of one program, but I can't have new version of qtcurve without doing it.

Edit:
I changed qtcurve to exygen but it keeps hanging.
http://pastebin.com/vtbDZhWj

Any ideas what causes it?

[whatthefunk]

It works fine here.
What version of Kubuntu do you use? What version of qt do you have installed?

[gnomek]

Kubuntu 14.04 64-bit

qtcurve: 1.8.14-3
kde-style-qtcurve: 1.8.14-3
gtk2-engines-qtcurve: 1.8.16-2
kwin-style-qtcurve: 1.8.14-3

Anki is python application. I wonder if it is a problem with qtcurve or gtk2-engines-qtcurve.

[claydoh]

It is python, but uses qt bindings for the ui, so it is not the qtcurve-gtk theme.

I could not get the version available in them repos for 14.04 to crash or freeze, but honestly I did not use it very much, mostly twiddles some knobs and stabbed some buttons in a vm.
Nothing in your gdb sessions even mention any style element,m so you may have a different bug, especially as it happens using the official, stock KDE oxygen style. (though qt doesn't itself use that, necessarily)

[gnomek]

I noticed that the problem occurs only when in qtconfig I choose QtCurve as a GUI style. When I choose GTK+ as a GUI style there is no problem (while still having in system settings qtcurve as interface style and and qtcurve as GTK2 style).

You say that it is not qtcurve-gtk theme. Is it caused by the way qt4-qtcurve uses QtCurve theme?

I reported a bug against qt4-x11
https://bugs.launchpad.net/ubuntu/+s...1/+bug/1495274

I suspect that qt4-qtcurve is the source of the problem not qtcurve theme itself because other apps like Dolphin don't crash when I choose qtcurve in qtconfig. But I am not sure if I correctly identified the package that causes the problem.

I wish I could set QtCurve as a GUI style in qtconfig because I want to use qtcurve in all applications, at least until next LTS.