Application: systemsettings (1.0)
KDE Platform Version: 4.10.00 (Compiled from sources)
Qt Version: 4.8.4
Operating System: Linux 3.8.0-7-generic x86_64
Distribution: Ubuntu Raring Ringtail (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
I Was changing Fonts to Stop Kubuntu Crashing

- Unusual behavior I noticed:
The System will freeze & i have to reboot to get things running again.

- Custom settings of the application:
None

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3e2e68b7c0 (LWP 2849))]

Thread 3 (Thread 0x7f3e10282700 (LWP 2872)):
#0  0x00007f3e2b68d3cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f3e246c015c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3e246c0284 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3e2be12026 in QEventDispatcherGlib::processEvents (this=0x7f3e080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f3e2bde237f in QEventLoop::processEvents (this=this@entry=0x7f3e10281d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f3e2bde2608 in QEventLoop::exec (this=0x7f3e10281d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f3e2bce4410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f3e2bdc3ecf in QInotifyFileSystemWatcherEngine::run (this=0x1771e90) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f3e2bce6bec in QThreadPrivate::start (arg=0x1771e90) at thread/qthread_unix.cpp:338
#9  0x00007f3e24b92f8e in start_thread (arg=0x7f3e10282700) at pthread_create.c:311
#10 0x00007f3e2b699e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f3e0cb36700 (LWP 2897)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f3e28f5ae77 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f3e28f5aea9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f3e24b92f8e in start_thread (arg=0x7f3e0cb36700) at pthread_create.c:311
#4  0x00007f3e2b699e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f3e2e68b7c0 (LWP 2849)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f3e281c3947 in QDeclarativeItem::~QDeclarativeItem (this=0x420c300, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007f3e2818810e in ~QDeclarativeElement (this=0x420c300, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x420c300, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007f3e2bdfd5d8 in QObject::event (this=0x420c300, e=<optimized out>) at kernel/qobject.cpp:1175
#11 0x00007f3e2ca468ec in QApplicationPrivate::notify_helper (this=this@entry=0x1183b30, receiver=receiver@entry=0x420c300, e=e@entry=0x1744690) at kernel/qapplication.cpp:4567
#12 0x00007f3e2ca4925b in QApplication::notify (this=0x7fff1bd962e0, receiver=0x420c300, e=0x1744690) at kernel/qapplication.cpp:4428
#13 0x00007f3e2d753666 in KApplication::notify (this=0x7fff1bd962e0, receiver=0x420c300, event=0x1744690) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f3e2bde362e in QCoreApplication::notifyInternal (this=0x7fff1bd962e0, receiver=receiver@entry=0x420c300, event=event@entry=0x1744690) at kernel/qcoreapplication.cpp:946
#15 0x00007f3e2bde7161 in sendEvent (event=0x1744690, receiver=0x420c300) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x11341f0) at kernel/qcoreapplication.cpp:1570
#17 0x00007f3e2be11e73 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#18 postEventSourceDispatch (s=0x1173680) at kernel/qeventdispatcher_glib.cpp:279
#19 0x00007f3e246bfe85 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f3e246c01c8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f3e246c0284 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f3e2be12006 in QEventDispatcherGlib::processEvents (this=0x1176de0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f3e2caec1ae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f3e2bde237f in QEventLoop::processEvents (this=this@entry=0x7fff1bd961c0, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f3e2bde2608 in QEventLoop::exec (this=0x7fff1bd961c0, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007f3e2bde7ce6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#27 0x000000000040aa2e in main (argc=5, argv=0x7fff1bd96428) at ../../../systemsettings/app/main.cpp:49

Possible duplicates by query: bug 315671, bug 315547, bug 314912, bug 311058, bug 310545.

Reported using DrKonqi