Application: systemsettings5 (5.2.1)

Qt Version: 5.4.0
Operating System: Linux 3.19.0-9-generic x86_64
Distribution: Ubuntu Vivid Vervet (development branch)

-- Information about the crash:
Installed Nvidia drivers
then changed font settings
then closed the app

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb27c9637c0 (LWP 2100))]

Thread 2 (Thread 0x7fb26b85c700 (LWP 2101)):
#0  0x00007fb2790b30cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb277e01b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb277e0364f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb26e5ef0b9 in QXcbEventReader::run (this=0xb257d0) at qxcbconnection.cpp:1105
#4  0x00007fb27973aa4e in QThreadPrivate::start (arg=0xb257d0) at thread/qthread_unix.cpp:337
#5  0x00007fb276d190a5 in start_thread (arg=0x7fb26b85c700) at pthread_create.c:309
#6  0x00007fb2790bd57d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fb27c9637c0 (LWP 2100)):
[KCrash Handler]
#6  0x00007fb259037b7b in QQuickItemPrivate::addToDirtyList() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fb259037c38 in QQuickItemPrivate::dirty(QQuickItemPrivate::DirtyType) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fb259041e75 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fb2799aa6ca in QObject::event (this=0x2489850, e=<optimized out>) at kernel/qobject.cpp:1245
#10 0x00007fb25904099b in QQuickItem::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fb27a7692ec in QApplicationPrivate::notify_helper (this=0xaf6f80, receiver=0x2489850, e=0x7fb23c1e3310) at kernel/qapplication.cpp:3722
#12 0x00007fb27a76e960 in QApplication::notify (this=0x7ffd43c34f00, receiver=0x2489850, e=0x7fb23c1e3310) at kernel/qapplication.cpp:3505
#13 0x00007fb279978bdb in QCoreApplication::notifyInternal (this=0x7ffd43c34f00, receiver=0x2489850, event=event@entry=0x7fb23c1e3310) at kernel/qcoreapplication.cpp:932
#14 0x00007fb27997ac4b in sendEvent (event=0x7fb23c1e3310, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xaf66b0) at kernel/qcoreapplication.cpp:1536
#16 0x00007fb27997b248 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1394
#17 0x00007fb2799d16a3 in postEventSourceDispatch (s=0xb6a340) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007fb2767f9c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fb2767f9f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fb2767f9fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fb2799d1ab7 in QEventDispatcherGlib::processEvents (this=0xb63e10, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#22 0x00007fb279976392 in QEventLoop::exec (this=this@entry=0x7ffd43c34de0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#23 0x00007fb27997dfdc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1185
#24 0x000000000040eebc in main (argc=1, argv=<optimized out>) at ../../app/main.cpp:54

Reported using DrKonqi