Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.19.0-15-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
In a System settings in tree view - switching from windows apperiance to GNOME (GTK) apps style.

-- Backtrace:
Application: Ustawienia systemowe (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa6195cf780 (LWP 12477))]

Thread 4 (Thread 0x7fa616358700 (LWP 12478)):
#0  0x00007fa6254c58dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa6237dfb72 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa6237e164f in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa619145099 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007fa625b46b0e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa6226f96aa in start_thread (arg=0x7fa616358700) at pthread_create.c:333
#6  0x00007fa6254d0eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fa608039700 (LWP 12480)):
#0  0x00007fa6254c149d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa61e636f85 in  () at /usr/lib/nvidia-349/tls/libnvidia-tls.so.349.16
#2  0x00007fa62221e2f0 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7fa608038d70, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#3  0x00007fa62221e2f0 in g_wakeup_acknowledge (wakeup=0x2685670) at /build/buildd/glib2.0-2.44.0/./glib/gwakeup.c:210
#4  0x00007fa6221da96c in g_main_context_check (context=context@entry=0x268bd60, max_priority=2147483647, fds=fds@entry=0x7fa6000010e0, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3600
#5  0x00007fa6221dae60 in g_main_context_iterate (context=0x268bd60, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3805
#6  0x00007fa6221db242 in g_main_loop_run (loop=0x268bcf0) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:4002
#7  0x00007fa60fd5fae6 in gdbus_shared_thread_func (user_data=0x268bd30) at /build/buildd/glib2.0-2.44.0/./gio/gdbusprivate.c:274
#8  0x00007fa622201955 in g_thread_proxy (data=0x2642770) at /build/buildd/glib2.0-2.44.0/./glib/gthread.c:764
#9  0x00007fa6226f96aa in start_thread (arg=0x7fa608039700) at pthread_create.c:333
#10 0x00007fa6254d0eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fa607838700 (LWP 12481)):
#0  0x00007fa6254c58dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa6221daebc in g_main_context_iterate (priority=2147483647, n_fds=2, fds=0x7fa5f80008c0, timeout=-1, context=0x23fdbb0) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:4103
#2  0x00007fa6221daebc in g_main_context_iterate (context=context@entry=0x23fdbb0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3803
#3  0x00007fa6221dafcc in g_main_context_iteration (context=0x23fdbb0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3869
#4  0x00007fa6221db009 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:5618
#5  0x00007fa622201955 in g_thread_proxy (data=0x26429e0) at /build/buildd/glib2.0-2.44.0/./glib/gthread.c:764
#6  0x00007fa6226f96aa in start_thread (arg=0x7fa607838700) at pthread_create.c:333
#7  0x00007fa6254d0eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa6195cf780 (LWP 12477)):
[KCrash Handler]
#6  0x00007fa624a2df97 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fa6249d8151 in QV4::ExecutionEngine::~ExecutionEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fa624b100d5 in QV8Engine::~QV8Engine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fa624b102b9 in QV8Engine::~QV8Engine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fa624975061 in QJSEngine::~QJSEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007fa624a723c5 in QQmlEngine::~QQmlEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007fa624a72499 in QQmlEngine::~QQmlEngine() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007fa5ded15be2 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#14 0x00007fa5ded19908 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#15 0x00007fa5ded19929 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#16 0x00007fa625db6778 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fa626b70b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007fa626b76000 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fa625d84c2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fa625d86c9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fa625ddd843 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fa6221dac3d in g_main_context_dispatch (context=0x7fa610001710) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3122
#23 0x00007fa6221dac3d in g_main_context_dispatch (context=context@entry=0x7fa610001710) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3737
#24 0x00007fa6221daf20 in g_main_context_iterate (context=context@entry=0x7fa610001710, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3808
#25 0x00007fa6221dafcc in g_main_context_iteration (context=0x7fa610001710, may_block=1) at /build/buildd/glib2.0-2.44.0/./glib/gmain.c:3869
#26 0x00007fa625dddc57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fa625d823e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fa625d8a02c in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x000000000040eebc in main ()

Reported using DrKonqi