Application: plasma-desktop (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:

I tried to apply System update (libavcodec53, libavformat53,libavutil51, libstproc52, libswscale2, libx264-123, python3-distupgrade, ubuntu-release-upgrader-core, ubuntu-release-upgrader-qt). After I authorized update, plasma crashes

- Unusual behavior I noticed:

System slowed and started lagged as if it was out of memory.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fdd37eee7c0 (LWP 2284))]

Thread 4 (Thread 0x7fdd1847b700 (LWP 2286)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fdd30b8a06b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fdd30b8a0a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fdd2b244f6e in start_thread (arg=0x7fdd1847b700) at pthread_create.c:311
#4  0x00007fdd377d79cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7fdc8dc73700 (LWP 2287)):
#0  0x00007fffd6bb2a2f in clock_gettime ()
#1  0x00007fdd377ec96d in clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fdd342cb757 in do_gettime (frac=0x7fdc8dc72b00, sec=0x7fdc8dc72af8) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007fdd343a4fe5 in updateCurrentTime (this=0x7fdc88002860) at kernel/qeventdispatcher_unix.cpp:354
#5  QTimerInfoList::timerWait (this=0x7fdc88002860, tm=...) at kernel/qeventdispatcher_unix.cpp:461
#6  0x00007fdd343a382c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fdc8dc72bb4) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007fdd343a38d5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007fdd2ab39d4d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fdd2ab3a5c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fdd2ab3a7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fdd343a3a76 in QEventDispatcherGlib::processEvents (this=0x7fdc880008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#12 0x00007fdd343755ef in QEventLoop::processEvents (this=this@entry=0x7fdc8dc72d70, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fdd343758e5 in QEventLoop::exec (this=this@entry=0x7fdc8dc72d70, flags=...) at kernel/qeventloop.cpp:204
#14 0x00007fdd3427488f in QThread::exec (this=this@entry=0x3711790) at thread/qthread.cpp:542
#15 0x00007fdd34356d13 in QInotifyFileSystemWatcherEngine::run (this=0x3711790) at io/qfilesystemwatcher_inotify.cpp:265
#16 0x00007fdd34276f2f in QThreadPrivate::start (arg=0x3711790) at thread/qthread_unix.cpp:338
#17 0x00007fdd2b244f6e in start_thread (arg=0x7fdc8dc73700) at pthread_create.c:311
#18 0x00007fdd377d79cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7fdc87fff700 (LWP 2288)):
#0  0x00007fffd6bb2a2f in clock_gettime ()
#1  0x00007fdd377ec96d in clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fdd342cb757 in do_gettime (frac=0x7fdc87ffeb00, sec=0x7fdc87ffeaf8) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007fdd343a4fe5 in updateCurrentTime (this=0x7fdc80002660) at kernel/qeventdispatcher_unix.cpp:354
#5  QTimerInfoList::timerWait (this=0x7fdc80002660, tm=...) at kernel/qeventdispatcher_unix.cpp:461
#6  0x00007fdd343a382c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fdc87ffebb4) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007fdd343a38d5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007fdd2ab39d4d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fdd2ab3a5c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fdd2ab3a7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fdd343a3a76 in QEventDispatcherGlib::processEvents (this=0x7fdc800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#12 0x00007fdd343755ef in QEventLoop::processEvents (this=this@entry=0x7fdc87ffed70, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fdd343758e5 in QEventLoop::exec (this=this@entry=0x7fdc87ffed70, flags=...) at kernel/qeventloop.cpp:204
#14 0x00007fdd3427488f in QThread::exec (this=this@entry=0x38b3f90) at thread/qthread.cpp:542
#15 0x00007fdd34356d13 in QInotifyFileSystemWatcherEngine::run (this=0x38b3f90) at io/qfilesystemwatcher_inotify.cpp:265
#16 0x00007fdd34276f2f in QThreadPrivate::start (arg=0x38b3f90) at thread/qthread_unix.cpp:338
#17 0x00007fdd2b244f6e in start_thread (arg=0x7fdc87fff700) at pthread_create.c:311
#18 0x00007fdd377d79cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7fdd37eee7c0 (LWP 2284)):
[KCrash Handler]
#6  QObject::startTimer (this=this@entry=0x5c6c030, interval=800) at kernel/qobject.cpp:1581
#7  0x00007fdd34393a76 in QTimer::start (this=0x5c6c030) at kernel/qtimer.cpp:218
#8  0x00007fdd34393a88 in QTimer::start (this=<optimized out>, msec=msec@entry=800) at kernel/qtimer.cpp:234
#9  0x00007fdc97002b90 in MouseEventListener::mousePressEvent (this=0x57c8e50, me=<optimized out>) at ../../../../plasma/declarativeimports/qtextracomponents/mouseeventlistener.cpp:110
#10 0x00007fdd33cbcaef in QGraphicsItem::sceneEvent (this=this@entry=0x57c8e60, event=event@entry=0x7fffd6a7dbb0) at graphicsview/qgraphicsitem.cpp:6739
#11 0x00007fdd35f70a54 in QDeclarativeItem::sceneEvent (this=0x57c8e50, event=0x7fffd6a7dbb0) at graphicsitems/qdeclarativeitem.cpp:3049
#12 0x00007fdd33ce3b3f in QGraphicsScenePrivate::sendMouseEvent (this=0x1fe9420, mouseEvent=0x7fffd6a7dbb0) at graphicsview/qgraphicsscene.cpp:1295
#13 0x00007fdd33cef3b6 in QGraphicsScenePrivate::mousePressEventHandler (this=this@entry=0x1fe9420, mouseEvent=mouseEvent@entry=0x7fffd6a7dbb0) at graphicsview/qgraphicsscene.cpp:1422
#14 0x00007fdd33cef849 in QGraphicsScene::mousePressEvent (this=<optimized out>, mouseEvent=0x7fffd6a7dbb0) at graphicsview/qgraphicsscene.cpp:4074
#15 0x00007fdd33cf86d0 in QGraphicsScene::event (this=0x1f82fa0, event=0x7fffd6a7dbb0) at graphicsview/qgraphicsscene.cpp:3455
#16 0x00007fdd33713dfc in QApplicationPrivate::notify_helper (this=this@entry=0x1f863d0, receiver=receiver@entry=0x1f82fa0, e=e@entry=0x7fffd6a7dbb0) at kernel/qapplication.cpp:4567
#17 0x00007fdd3371a470 in QApplication::notify (this=this@entry=0x1f765c0, receiver=receiver@entry=0x1f82fa0, e=e@entry=0x7fffd6a7dbb0) at kernel/qapplication.cpp:4353
#18 0x00007fdd3503aa6a in KApplication::notify (this=0x1f765c0, receiver=0x1f82fa0, event=0x7fffd6a7dbb0) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007fdd343768bd in QCoreApplication::notifyInternal (this=0x1f765c0, receiver=0x1f82fa0, event=event@entry=0x7fffd6a7dbb0) at kernel/qcoreapplication.cpp:946
#20 0x00007fdd33712526 in sendSpontaneousEvent (event=event@entry=0x7fffd6a7dbb0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#21 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fffd6a7dbb0) at kernel/qapplication.cpp:5565
#22 0x00007fdd33d0f0af in QGraphicsView::mousePressEvent (this=0x4b28bc0, event=0x7fffd6a7e120) at graphicsview/qgraphicsview.cpp:3164
#23 0x00007fdd33763191 in QWidget::event (this=this@entry=0x4b28bc0, event=event@entry=0x7fffd6a7e120) at kernel/qwidget.cpp:8371
#24 0x00007fdd33b045be in QFrame::event (this=0x4b28bc0, e=0x7fffd6a7e120) at widgets/qframe.cpp:557
#25 0x00007fdd33d0fe09 in QGraphicsView::viewportEvent (this=0x4b28bc0, event=0x7fffd6a7e120) at graphicsview/qgraphicsview.cpp:2866
#26 0x00007fdd34376a26 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1f863d0, receiver=receiver@entry=0x4b1fe00, event=event@entry=0x7fffd6a7e120) at kernel/qcoreapplication.cpp:1056
#27 0x00007fdd33713ddc in QApplicationPrivate::notify_helper (this=this@entry=0x1f863d0, receiver=receiver@entry=0x4b1fe00, e=e@entry=0x7fffd6a7e120) at kernel/qapplication.cpp:4563
#28 0x00007fdd3371a5ad in QApplication::notify (this=this@entry=0x1f765c0, receiver=receiver@entry=0x4b1fe00, e=e@entry=0x7fffd6a7e120) at kernel/qapplication.cpp:4110
#29 0x00007fdd3503aa6a in KApplication::notify (this=0x1f765c0, receiver=0x4b1fe00, event=0x7fffd6a7e120) at ../../kdeui/kernel/kapplication.cpp:311
#30 0x00007fdd343768bd in QCoreApplication::notifyInternal (this=0x1f765c0, receiver=receiver@entry=0x4b1fe00, event=event@entry=0x7fffd6a7e120) at kernel/qcoreapplication.cpp:946
#31 0x00007fdd33719d63 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x4b1fe00, event=event@entry=0x7fffd6a7e120, alienWidget=alienWidget@entry=0x4b1fe00, nativeWidget=nativeWidget@entry=0x4b28bc0, buttonDown=buttonDown@entry=0x7fdd341f82f8 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#33 0x00007fdd3378e7db in QETWidget::translateMouseEvent (this=this@entry=0x4b28bc0, event=event@entry=0x7fffd6a7e4a0) at kernel/qapplication_x11.cpp:4631
#34 0x00007fdd3378e079 in QApplication::x11ProcessEvent (this=0x1f765c0, event=event@entry=0x7fffd6a7e4a0) at kernel/qapplication_x11.cpp:3624
#35 0x00007fdd337b5922 in x11EventSourceDispatch (s=0x1f88200, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00007fdd2ab3a3b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007fdd2ab3a708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007fdd2ab3a7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007fdd343a3a55 in QEventDispatcherGlib::processEvents (this=0x1ef5ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#40 0x00007fdd337b59d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007fdd343755ef in QEventLoop::processEvents (this=this@entry=0x7fffd6a7e880, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007fdd343758e5 in QEventLoop::exec (this=this@entry=0x7fffd6a7e880, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007fdd3437ae5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#44 0x00007fdd3371234c in QApplication::exec () at kernel/qapplication.cpp:3828
#45 0x00007fdd37ae127c in kdemain (argc=1, argv=0x7fffd6a7ead8) at ../../../../plasma/desktop/shell/main.cpp:126
#46 0x00007fdd376fede5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fffd6a7ead8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd6a7eac8) at libc-start.c:260
#47 0x000000000040070e in _start ()

Reported using DrKonqi