Application: systemsettings5 (5.2.2)

Qt Version: 5.4.1
Operating System: Linux 3.16.0-57-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
- What I was doing when the application crashed:
Trying to open Workspace Theme in System Settings. System Settings crashed three or four times in a row.

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 0x7f944e51d780 (LWP 19255))]

Thread 2 (Thread 0x7f942d210700 (LWP 19257)):
#0  0x00007f944ac868dd in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f944799bebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f944799bfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f944b59ec6c in QEventDispatcherGlib::processEvents (this=0x7f94280008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f944b5433e2 in QEventLoop::exec (this=this@entry=0x7f942d20fe20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f944b302b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f944a2cdf65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f944b307b0e in QThreadPrivate::start (arg=0x2423f20) at thread/qthread_unix.cpp:337
#8  0x00007f9447eba6aa in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9  0x00007f944ac91eed in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7f944e51d780 (LWP 19255)):
[KCrash Handler]
#6  0x00007f944abc0267 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x00007f944abc1eca in abort () from /lib/x86_64-linux-gnu/libc.so.6
#8  0x00007f944b2f4edf in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1415
#9  QMessageLogger::fatal (this=0x7ffc550bd220, msg=<optimized out>) at global/qlogging.cpp:636
#10 0x00007f9449d75791 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f9449d7f06f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f9449d7f30a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f944bd7d7b5 in QWindow::event (this=0x243e220, ev=<optimized out>) at kernel/qwindow.cpp:2051
#14 0x00007f9449db0dd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f944c331b2c in QApplicationPrivate::notify_helper (this=0x1fe69a0, receiver=0x243e220, e=0x7ffc550bd6a0) at kernel/qapplication.cpp:3720
#16 0x00007f944c337000 in QApplication::notify (this=0x7ffc550bdaa0, receiver=0x243e220, e=0x7ffc550bd6a0) at kernel/qapplication.cpp:3503
#17 0x00007f944b545c2b in QCoreApplication::notifyInternal (this=0x7ffc550bdaa0, receiver=receiver@entry=0x243e220, event=event@entry=0x7ffc550bd6a0) at kernel/qcoreapplication.cpp:935
#18 0x00007f944bd75e86 in sendSpontaneousEvent (event=0x7ffc550bd6a0, receiver=0x243e220) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QGuiApplicationPrivate::processExposeEvent (e=0x258eea0) at kernel/qguiapplication.cpp:2613
#20 0x00007f944bd76bbd in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x258eea0) at kernel/qguiapplication.cpp:1638
#21 0x00007f944bd5b34f in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#22 0x00007f943ec46590 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#23 0x00007f944799bc3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f944799bf20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f944799bfcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f944b59ec57 in QEventDispatcherGlib::processEvents (this=0x2060850, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#27 0x00007f944b5433e2 in QEventLoop::exec (this=this@entry=0x7ffc550bd980, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#28 0x00007f944b54b02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#29 0x00007f944bd6c31c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#30 0x00007f944c32d7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#31 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi