Application: kded4 (4.12.2)
KDE Platform Version: 4.12.2
Qt Version: 4.8.6
Operating System: Linux 3.11.0-17-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
I was running Microshit windows 7 in VirtualBox whilst downloading a large file. i was also running "tracepath" in a terminal window.
The PC completely froze

-- Backtrace:
Application: KDE Daemon (kded4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2f8ab047c0 (LWP 2165))]

Thread 2 (Thread 0x7f2f67bbd700 (LWP 2192)):
#0  0x00007f2f854ae0ea in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2f854ae3c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2f8546dd40 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2f8546e5c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2f8546e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f2f897a1af6 in QEventDispatcherGlib::processEvents (this=0x7f2f540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#6  0x00007f2f8977330f in QEventLoop::processEvents (this=this@entry=0x7f2f67bbcd70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f2f89773605 in QEventLoop::exec (this=this@entry=0x7f2f67bbcd70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f2f8966fc4f in QThread::exec (this=this@entry=0x19e8040) at thread/qthread.cpp:537
#9  0x00007f2f89754a33 in QInotifyFileSystemWatcherEngine::run (this=0x19e8040) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f2f8967231f in QThreadPrivate::start (arg=0x19e8040) at thread/qthread_unix.cpp:349
#11 0x00007f2f85b49f6e in start_thread (arg=0x7f2f67bbd700) at pthread_create.c:311
#12 0x00007f2f883729cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f2f8ab047c0 (LWP 2165)):
[KCrash Handler]
#6  0x00007f2f8978c1e3 in QMetaObject::changeGuard (ptr=ptr@entry=0x1ffd120, o=0x1f17e80) at kernel/qobject.cpp:445
#7  0x00007f2f890d5b8c in operator= (p=<optimized out>, this=0x1ffd120) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:68
#8  QGraphicsProxyWidgetPrivate::sendWidgetMouseEvent (this=0x1ffcf40, event=0x7fff92db2ed0) at graphicsview/qgraphicsproxywidget.cpp:284
#9  0x00007f2f890b7ff2 in QGraphicsItem::sceneEvent (this=0x1facd60, event=0x7fff92db2ed0) at graphicsview/qgraphicsitem.cpp:6755
#10 0x00007f2f890df0cf in QGraphicsScenePrivate::sendMouseEvent (this=0x1db6a40, mouseEvent=0x7fff92db2ed0) at graphicsview/qgraphicsscene.cpp:1295
#11 0x00007f2f890e7d2f in QGraphicsScene::mouseReleaseEvent (this=<optimized out>, mouseEvent=0x7fff92db2ed0) at graphicsview/qgraphicsscene.cpp:4128
#12 0x00007f2f890f3ca0 in QGraphicsScene::event (this=0x1db63c0, event=0x7fff92db2ed0) at graphicsview/qgraphicsscene.cpp:3458
#13 0x00007f2f88b0de7c in QApplicationPrivate::notify_helper (this=this@entry=0x183cd10, receiver=receiver@entry=0x1db63c0, e=e@entry=0x7fff92db2ed0) at kernel/qapplication.cpp:4567
#14 0x00007f2f88b144f0 in QApplication::notify (this=this@entry=0x7fff92db3cc0, receiver=receiver@entry=0x1db63c0, e=e@entry=0x7fff92db2ed0) at kernel/qapplication.cpp:4353
#15 0x00007f2f8a4f3c6a in KApplication::notify (this=0x7fff92db3cc0, receiver=0x1db63c0, event=0x7fff92db2ed0) at ../../kdeui/kernel/kapplication.cpp:311
#16 0x00007f2f8977473d in QCoreApplication::notifyInternal (this=0x7fff92db3cc0, receiver=0x1db63c0, event=event@entry=0x7fff92db2ed0) at kernel/qcoreapplication.cpp:953
#17 0x00007f2f88b0c5a6 in sendSpontaneousEvent (event=event@entry=0x7fff92db2ed0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#18 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff92db2ed0) at kernel/qapplication.cpp:5565
#19 0x00007f2f8910a977 in QGraphicsView::mouseReleaseEvent (this=0x1d94f60, event=0x7fff92db3430) at graphicsview/qgraphicsview.cpp:3338
#20 0x00007f2f88b5d5be in QWidget::event (this=this@entry=0x1d94f60, event=event@entry=0x7fff92db3430) at kernel/qwidget.cpp:8376
#21 0x00007f2f88eff66e in QFrame::event (this=0x1d94f60, e=0x7fff92db3430) at widgets/qframe.cpp:557
#22 0x00007f2f8910b399 in QGraphicsView::viewportEvent (this=0x1d94f60, event=0x7fff92db3430) at graphicsview/qgraphicsview.cpp:2866
#23 0x00007f2f897748a6 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x183cd10, receiver=receiver@entry=0x1d98fd0, event=event@entry=0x7fff92db3430) at kernel/qcoreapplication.cpp:1063
#24 0x00007f2f88b0de5c in QApplicationPrivate::notify_helper (this=this@entry=0x183cd10, receiver=receiver@entry=0x1d98fd0, e=e@entry=0x7fff92db3430) at kernel/qapplication.cpp:4563
#25 0x00007f2f88b1462d in QApplication::notify (this=this@entry=0x7fff92db3cc0, receiver=receiver@entry=0x1d98fd0, e=e@entry=0x7fff92db3430) at kernel/qapplication.cpp:4110
#26 0x00007f2f8a4f3c6a in KApplication::notify (this=0x7fff92db3cc0, receiver=0x1d98fd0, event=0x7fff92db3430) at ../../kdeui/kernel/kapplication.cpp:311
#27 0x00007f2f8977473d in QCoreApplication::notifyInternal (this=0x7fff92db3cc0, receiver=receiver@entry=0x1d98fd0, event=event@entry=0x7fff92db3430) at kernel/qcoreapplication.cpp:953
#28 0x00007f2f88b13de3 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#29 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x1d98fd0, event=event@entry=0x7fff92db3430, alienWidget=alienWidget@entry=0x1d98fd0, nativeWidget=nativeWidget@entry=0x1d94f60, buttonDown=buttonDown@entry=0x7f2f895f3318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#30 0x00007f2f88b88abb in QETWidget::translateMouseEvent (this=this@entry=0x1d94f60, event=event@entry=0x7fff92db37b0) at kernel/qapplication_x11.cpp:4634
#31 0x00007f2f88b88359 in QApplication::x11ProcessEvent (this=0x7fff92db3cc0, event=event@entry=0x7fff92db37b0) at kernel/qapplication_x11.cpp:3627
#32 0x00007f2f88bafc02 in x11EventSourceDispatch (s=0x183e2b0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0x00007f2f8546e3b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f2f8546e708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f2f8546e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f2f897a1ad5 in QEventDispatcherGlib::processEvents (this=0x1798690, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#37 0x00007f2f88bafcb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007f2f8977330f in QEventLoop::processEvents (this=this@entry=0x7fff92db3b90, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007f2f89773605 in QEventLoop::exec (this=this@entry=0x7fff92db3b90, flags=...) at kernel/qeventloop.cpp:204
#40 0x00007f2f89778deb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#41 0x00007f2f88b0c3cc in QApplication::exec () at kernel/qapplication.cpp:3828
#42 0x00007f2f751e895b in kdemain (argc=1, argv=0x1816f00) at ../../kded/kded.cpp:925
#43 0x00000000004083f5 in launch (argc=argc@entry=1, _name=_name@entry=0x40b007 "kded4", args=<optimized out>, args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=reset_env@entry=false, tty=tty@entry=0x0, avoid_loops=avoid_loops@entry=false, startup_id_str=startup_id_str@entry=0x40ae96 "0") at ../../kinit/kinit.cpp:738
#44 0x00000000004059a6 in main (argc=4, argv=<optimized out>, envp=0x7fff92db4420) at ../../kinit/kinit.cpp:1853

Possible duplicates by query: bug 328758.

Reported using DrKonqi