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:

Trying to change my:
- Window Decorations
- Login Screen (SDDM)
- Desktop Effects
- Screen Locking
- Activities
- Look and Feel

There may be other control panels that also crash, not sure; whenever I click into "Workspace Theme" the panel that activates there ("Look and Feel") crashes System Settings before I have a chance to click on another entry.

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 0x7fdfa1ad8780 (LWP 30264))]

Thread 5 (Thread 0x7fdf8f18f700 (LWP 30265)):
#0  0x00007fdf9e2038dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fdf9c4f9b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fdf9c4fb64f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fdf91fa3099 in QXcbEventReader::run (this=0x120caf0) at qxcbconnection.cpp:1105
#4  0x00007fdf9e88bb0e in QThreadPrivate::start (arg=0x120caf0) at thread/qthread_unix.cpp:337
#5  0x00007fdf9b3f76aa in start_thread (arg=0x7fdf8f18f700) at pthread_create.c:333
#6  0x00007fdf9e20eeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fdf80fd7700 (LWP 30266)):
#0  0x00007fdf9e1ff49d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fdf972f1f45 in ?? () from /usr/lib/nvidia-346/tls/libnvidia-tls.so.346.59
#2  0x00007fdf9af152f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdf9aed196c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fdf9aed1e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fdf9aed2242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fdf8cbe7ae6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#7  0x00007fdf9aef8955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fdf9b3f76aa in start_thread (arg=0x7fdf80fd7700) at pthread_create.c:333
#9  0x00007fdf9e20eeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fdf7bfff700 (LWP 30267)):
#0  0x00007fdf9e2038dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fdf9aed1ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdf9aed1fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdf9aed2009 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fdf9aef8955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fdf9b3f76aa in start_thread (arg=0x7fdf7bfff700) at pthread_create.c:333
#6  0x00007fdf9e20eeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fdf7b7fe700 (LWP 30343)):
#0  0x00007fdf9af16789 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fdf9aed0df0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdf9aed1d75 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdf9aed1fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fdf9eb22c6c in QEventDispatcherGlib::processEvents (this=0x7fdf6c0015e0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fdf9eac73e2 in QEventLoop::exec (this=this@entry=0x7fdf7b7fde20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fdf9e886b44 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fdf9d839f65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fdf9e88bb0e in QThreadPrivate::start (arg=0x18d6550) at thread/qthread_unix.cpp:337
#9  0x00007fdf9b3f76aa in start_thread (arg=0x7fdf7b7fe700) at pthread_create.c:333
#10 0x00007fdf9e20eeed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fdfa1ad8780 (LWP 30264)):
[KCrash Handler]
#6  0x00007fdf9e13d267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#7  0x00007fdf9e13eeca in __GI_abort () at abort.c:89
#8  0x00007fdf9e878edf in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1415
#9  QMessageLogger::fatal (this=0x7ffdc43caa50, msg=<optimized out>) at global/qlogging.cpp:636
#10 0x00007fdf9d2de791 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fdf9d2e806f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fdf9d2e830a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fdf9f30c7b5 in QWindow::event (this=0x19285b0, ev=<optimized out>) at kernel/qwindow.cpp:2051
#14 0x00007fdf9d319dd3 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fdf9f8c3b2c in QApplicationPrivate::notify_helper (this=0x11df510, receiver=0x19285b0, e=0x7ffdc43caed0) at kernel/qapplication.cpp:3720
#16 0x00007fdf9f8c9000 in QApplication::notify (this=0x7ffdc43cb2d0, receiver=0x19285b0, e=0x7ffdc43caed0) at kernel/qapplication.cpp:3503
#17 0x00007fdf9eac9c2b in QCoreApplication::notifyInternal (this=0x7ffdc43cb2d0, receiver=receiver@entry=0x19285b0, event=event@entry=0x7ffdc43caed0) at kernel/qcoreapplication.cpp:935
#18 0x00007fdf9f304e86 in sendSpontaneousEvent (event=0x7ffdc43caed0, receiver=0x19285b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QGuiApplicationPrivate::processExposeEvent (e=0x184f320) at kernel/qguiapplication.cpp:2613
#20 0x00007fdf9f305bbd in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x184f320) at kernel/qguiapplication.cpp:1638
#21 0x00007fdf9f2ea34f in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:572
#22 0x00007fdf91fcd590 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#23 0x00007fdf9aed1c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fdf9aed1f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fdf9aed1fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fdf9eb22c57 in QEventDispatcherGlib::processEvents (this=0x11db660, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#27 0x00007fdf9eac73e2 in QEventLoop::exec (this=this@entry=0x7ffdc43cb1b0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#28 0x00007fdf9eacf02c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#29 0x00007fdf9f2fb31c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1510
#30 0x00007fdf9f8bf7a5 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