Application: systemsettings5 (5.3.1)

Qt Version: 5.4.1
Operating System: Linux 3.16.0-31-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
Crash appears every time I get into System Settings -> Appearance -> Workspace Theme (using Kubuntu 15.04, Plasma 5.3)

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa413a29780 (LWP 4448))]

Thread 4 (Thread 0x7fa4010e2700 (LWP 4449)):
#0  0x00007fa4101908dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa40e4aab72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa40e4ac64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa403e75099 in QXcbEventReader::run (this=0x6d0750) at qxcbconnection.cpp:1105
#4  0x00007fa410811b0e in QThreadPrivate::start (arg=0x6d0750) at thread/qthread_unix.cpp:337
#5  0x00007fa40d3c46aa in start_thread (arg=0x7fa4010e2700) at pthread_create.c:333
#6  0x00007fa41019beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fa3f1dcf700 (LWP 4458)):
#0  0x00007fa41018c49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa40930cf45 in ?? () from /usr/lib/nvidia-346/tls/libnvidia-tls.so.346.59
#2  0x00007fa40cee92f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa40cea596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa40cea5e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa40cea5fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fa410aa8c6c in QEventDispatcherGlib::processEvents (this=0x7fa3ec0008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#7  0x00007fa410a4d3e2 in QEventLoop::exec (this=this@entry=0x7fa3f1dcee20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007fa41080cb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#9  0x00007fa40f7d7f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fa410811b0e in QThreadPrivate::start (arg=0xb5c5b0) at thread/qthread_unix.cpp:337
#11 0x00007fa40d3c46aa in start_thread (arg=0x7fa3f1dcf700) at pthread_create.c:333
#12 0x00007fa41019beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fa3ea33a700 (LWP 4460)):
#0  0x00007fa41018c49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa40930cf45 in ?? () from /usr/lib/nvidia-346/tls/libnvidia-tls.so.346.59
#2  0x00007fa40cee92f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa40cea596c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fa40cea5e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fa40cea5fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fa410aa8c6c in QEventDispatcherGlib::processEvents (this=0x7fa3e40008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#7  0x00007fa410a4d3e2 in QEventLoop::exec (this=this@entry=0x7fa3ea339e20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#8  0x00007fa41080cb44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#9  0x00007fa40f7d7f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fa410811b0e in QThreadPrivate::start (arg=0xe93f20) at thread/qthread_unix.cpp:337
#11 0x00007fa40d3c46aa in start_thread (arg=0x7fa3ea33a700) at pthread_create.c:333
#12 0x00007fa41019beed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fa413a29780 (LWP 4448)):
[KCrash Handler]
#6  0x00007fa4100ca267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#7  0x00007fa4100cbeca in __GI_abort () at abort.c:89
#8  0x00007fa4107feedf in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1415
#9  QMessageLogger::fatal (this=0x7fff4283e8f0, msg=<optimized out>) at global/qlogging.cpp:636
#10 0x00007fa40f27f791 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fa40f28906f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fa40f28930a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fa4112877b5 in QWindow::event (this=0xb0d7b0, ev=<optimized out>) at kernel/qwindow.cpp:2051
#14 0x00007fa40f2badd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fa41183bb2c in QApplicationPrivate::notify_helper (this=0x6a6550, receiver=0xb0d7b0, e=0x7fff4283ed70) at kernel/qapplication.cpp:3720
#16 0x00007fa411841000 in QApplication::notify (this=0x7fff4283f170, receiver=0xb0d7b0, e=0x7fff4283ed70) at kernel/qapplication.cpp:3503
#17 0x00007fa410a4fc2b in QCoreApplication::notifyInternal (this=0x7fff4283f170, receiver=receiver@entry=0xb0d7b0, event=event@entry=0x7fff4283ed70) at kernel/qcoreapplication.cpp:935
#18 0x00007fa41127fe86 in sendSpontaneousEvent (event=0x7fff4283ed70, receiver=0xb0d7b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QGuiApplicationPrivate::processExposeEvent (e=0xbc8540) at kernel/qguiapplication.cpp:2613
#20 0x00007fa411280bbd in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0xbc8540) at kernel/qguiapplication.cpp:1638
#21 0x00007fa41126534f in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#22 0x00007fa403e9f590 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#23 0x00007fa40cea5c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fa40cea5f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fa40cea5fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fa410aa8c57 in QEventDispatcherGlib::processEvents (this=0x7094f0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#27 0x00007fa410a4d3e2 in QEventLoop::exec (this=this@entry=0x7fff4283f050, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#28 0x00007fa410a5502c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#29 0x00007fa41127631c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#30 0x00007fa4118377a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#31 0x000000000040ef6b in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:55

Reported using DrKonqi