Application: systemsettings5 (5.3.1)

Qt Version: 5.4.2
Operating System: Linux 4.0.4-303.fc22.x86_64 x86_64
Distribution: "Fedora release 22 (Twenty Two)"

-- Information about the crash:
- What I was doing when the application crashed:

I've changed KDE theme to "Elegance". After that when I try to select (thist name can be different but I am trying to translate it from Polish):
System Settings->Apperance->Program Styles->Window Decoration I get an information about error.

The crash can be reproduced every time.

-- Backtrace:
Application: Ustawienia systemowe (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7faa0c649880 (LWP 1949))]

Thread 5 (Thread 0x7fa9ef739700 (LWP 1950)):
#0  0x00007faa0695566d in poll () from /lib64/libc.so.6
#1  0x00007faa038c6182 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007faa038c7d07 in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007fa9f2ec69b9 in QXcbEventReader::run() () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#4  0x00007faa0755fe3e in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007faa03083555 in start_thread () from /lib64/libpthread.so.0
#6  0x00007faa06960f3d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7fa9e19a0700 (LWP 1959)):
#0  0x00007faa0695566d in poll () from /lib64/libc.so.6
#1  0x00007faa022cedbc in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#2  0x00007faa022ceecc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007faa07796b8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007faa0773ceba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007faa0755af54 in QThread::exec() () from /lib64/libQt5Core.so.5
#6  0x00007faa05d3a955 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#7  0x00007faa0755fe3e in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#8  0x00007faa03083555 in start_thread () from /lib64/libpthread.so.0
#9  0x00007faa06960f3d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fa9da680700 (LWP 1960)):
#0  0x00007faa07536940 in g_main_context_iteration@plt () from /lib64/libQt5Core.so.5
#1  0x00007faa07796b8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#2  0x00007faa0773ceba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#3  0x00007faa0755af54 in QThread::exec() () from /lib64/libQt5Core.so.5
#4  0x00007faa05d3a955 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#5  0x00007faa0755fe3e in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#6  0x00007faa03083555 in start_thread () from /lib64/libpthread.so.0
#7  0x00007faa06960f3d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fa9d3fff700 (LWP 1961)):
#0  0x00007faa03088530 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007faa075610cb in QWaitCondition::wait(QMutex*, unsigned long) () from /lib64/libQt5Core.so.5
#2  0x00007faa061f239e in QSGRenderThread::processEventsAndWaitForMore() () from /lib64/libQt5Quick.so.5
#3  0x00007faa061f2c23 in QSGRenderThread::run() () from /lib64/libQt5Quick.so.5
#4  0x00007faa0755fe3e in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007faa03083555 in start_thread () from /lib64/libpthread.so.0
#6  0x00007faa06960f3d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7faa0c649880 (LWP 1949)):
[KCrash Handler]
#5  0x00007fa9cc745f90 in ?? ()
#6  0x00007fa9e20469a1 in KDecoration2::Decoration::update(QRect const&) () from /lib64/libkdecorations2.so.5
#7  0x00007fa9e2046a08 in KDecoration2::Decoration::update() () from /lib64/libkdecorations2.so.5
#8  0x00007fa9da93d880 in Breeze::Decoration::setOpacity(double) () from /usr/lib64/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#9  0x00007fa9da95dcc8 in Breeze::Decoration::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/qt5/plugins/org.kde.kdecoration2/breezedecoration.so
#10 0x00007faa07540e9a in QPropertyAnimation::updateCurrentValue(QVariant const&) () from /lib64/libQt5Core.so.5
#11 0x00007faa0753cea8 in QVariantAnimationPrivate::setCurrentValueForProgress(double) () from /lib64/libQt5Core.so.5
#12 0x00007faa0753d5a7 in QVariantAnimationPrivate::recalculateCurrentInterval(bool) () from /lib64/libQt5Core.so.5
#13 0x00007faa07539fbf in QAbstractAnimation::setCurrentTime(int) () from /lib64/libQt5Core.so.5
#14 0x00007faa0753a2bd in QUnifiedTimer::updateAnimationTimers(long long) () from /lib64/libQt5Core.so.5
#15 0x00007faa0753af0c in QAnimationDriver::advanceAnimation(long long) () from /lib64/libQt5Core.so.5
#16 0x00007faa061d2d1f in QSGAnimationDriver::advance() () from /lib64/libQt5Quick.so.5
#17 0x00007faa061ef7f4 in QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window*, bool) () from /lib64/libQt5Quick.so.5
#18 0x00007faa061f1b8f in QSGThreadedRenderLoop::handleExposure(QQuickWindow*) () from /lib64/libQt5Quick.so.5
#19 0x00007faa061f219b in QSGThreadedRenderLoop::exposureChanged(QQuickWindow*) () from /lib64/libQt5Quick.so.5
#20 0x00007faa08a9b145 in QWindow::event(QEvent*) () from /lib64/libQt5Gui.so.5
#21 0x00007faa06222843 in QQuickWindow::event(QEvent*) () from /lib64/libQt5Quick.so.5
#22 0x00007faa092357ec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#23 0x00007faa0923ae90 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#24 0x00007faa0773f67b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#25 0x00007faa08a93cb6 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /lib64/libQt5Gui.so.5
#26 0x00007faa08a94a0d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /lib64/libQt5Gui.so.5
#27 0x00007faa08a79de8 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Gui.so.5
#28 0x00007fa9f2ef3600 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#29 0x00007faa022cea8a in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#30 0x00007faa022cee20 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#31 0x00007faa022ceecc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#32 0x00007faa07796b6f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#33 0x00007faa0773ceba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#34 0x00007faa07744a2c in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#35 0x000000000040eb2c in main ()

Reported using DrKonqi