Bug 335409

Application: plasma-desktop (4.11.9)
KDE Platform Version: 4.13.0
Qt Version: 4.8.6
Operating System: Linux 3.13.0-27-generic i686
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Usualy I have 1-2 eclipse CDT, few konsole, a firefox and a remote-desktop connection and 2 monitors. 
It apears almoust each day as a crash or as a high processsor load. It dont seams to be related to some action. 
I use an Nvidia driver 334.21 installed today but reproduced also with a other version 331.38. I don't know if is related with the driver but I found several other plasma crashes related to the driver. The backtraces does not seams to be related.
Sometimes after the crash the plasma-destop recovers but sometimes it disapear. The applications remain active and alt+tab works  and it start corectly if started manualy from cmd plasma-desktop.
Usualy my desktop remains on for few days. Current backtrace is after 1 hour from startup.
It happened also in 12.04 but much rarely (once a month) but now in 14.04 it happens at few days (1-2).

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xaed97740 (LWP 3234))]

Thread 8 (Thread 0xa1d3fb40 (LWP 3235)):
#0  0xb1fa952d in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb1fabd51 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb1fac37a in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1fac528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb603195f in QEventDispatcherGlib::processEvents (this=0xa1400480, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#5  0xb6000823 in QEventLoop::processEvents (this=this@entry=0xa1d3f258, flags=...) at kernel/qeventloop.cpp:149
#6  0xb6000b49 in QEventLoop::exec (this=this@entry=0xa1d3f258, flags=...) at kernel/qeventloop.cpp:204
#7  0xb5eed23d in QThread::exec (this=this@entry=0x9852648) at thread/qthread.cpp:537
#8  0xb5fe0c44 in QInotifyFileSystemWatcherEngine::run (this=0x9852648) at io/qfilesystemwatcher_inotify.cpp:265
#9  0xb5eefb6f in QThreadPrivate::start (arg=0x9852648) at thread/qthread_unix.cpp:349
#10 0xb20c8f70 in start_thread (arg=0xa1d3fb40) at pthread_create.c:312
#11 0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 7 (Thread 0xa0ceab40 (LWP 3245)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb20ccd4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb75d08ec in __pthread_cond_wait (cond=0xb31da8d0, mutex=0xb31da8b8) at forward.c:149
#3  0xb30d7c92 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb30d7cdf in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb20c8f70 in start_thread (arg=0xa0ceab40) at pthread_create.c:312
#6  0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 6 (Thread 0x9dbc2b40 (LWP 3273)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb75b273b in read () at ../sysdeps/unix/syscall-template.S:81
#2  0xb147f54c in ?? () from /usr/lib/tls/libnvidia-tls.so.334.21
#3  0xb1ff028e in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1fabecb in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb1fac37a in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb1fac528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb603195f in QEventDispatcherGlib::processEvents (this=0x9d200480, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#8  0xb6000823 in QEventLoop::processEvents (this=this@entry=0x9dbc2258, flags=...) at kernel/qeventloop.cpp:149
#9  0xb6000b49 in QEventLoop::exec (this=this@entry=0x9dbc2258, flags=...) at kernel/qeventloop.cpp:204
#10 0xb5eed23d in QThread::exec (this=this@entry=0x9ddbb60) at thread/qthread.cpp:537
#11 0xb5fe0c44 in QInotifyFileSystemWatcherEngine::run (this=0x9ddbb60) at io/qfilesystemwatcher_inotify.cpp:265
#12 0xb5eefb6f in QThreadPrivate::start (arg=0x9ddbb60) at thread/qthread_unix.cpp:349
#13 0xb20c8f70 in start_thread (arg=0x9dbc2b40) at pthread_create.c:312
#14 0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 5 (Thread 0x9d1ffb40 (LWP 3274)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb20ccd4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb75d08ec in __pthread_cond_wait (cond=0xb52dfcb0, mutex=0xb52dfc98) at forward.c:149
#3  0xb4a679ac in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb4a679ff in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb20c8f70 in start_thread (arg=0x9d1ffb40) at pthread_create.c:312
#6  0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 4 (Thread 0x9c6ffb40 (LWP 3280)):
#0  0xb7720424 in __kernel_vsyscall ()
#1  0xb20ccd4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb75d08ec in __pthread_cond_wait (cond=0x9c74c7dc, mutex=0x9c74c7c4) at forward.c:149
#3  0xb4a969f3 in WTF::ThreadCondition::wait(WTF::Mutex&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb4772574 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb4a7d7c6 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#6  0xb4a96369 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#7  0xb20c8f70 in start_thread (arg=0x9c6ffb40) at pthread_create.c:312
#8  0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 3 (Thread 0x9997fb40 (LWP 3372)):
#0  0xb1ff0d2e in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb1ff1138 in g_mutex_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb1fab515 in g_main_context_release () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1fac390 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1fac528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb603195f in QEventDispatcherGlib::processEvents (this=0x99000480, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0xb6000823 in QEventLoop::processEvents (this=this@entry=0x9997f288, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6000b49 in QEventLoop::exec (this=this@entry=0x9997f288, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5eed23d in QThread::exec (this=this@entry=0x9dae038) at thread/qthread.cpp:537
#9  0xb5eed38b in QThread::run (this=0x9dae038) at thread/qthread.cpp:604
#10 0xb5eefb6f in QThreadPrivate::start (arg=0x9dae038) at thread/qthread_unix.cpp:349
#11 0xb20c8f70 in start_thread (arg=0x9997fb40) at pthread_create.c:312
#12 0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 2 (Thread 0x98f33b40 (LWP 3401)):
#0  0xb1ff0d3b in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb1ff1138 in g_mutex_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb1fab99e in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb1fac2df in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb1fac528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb603195f in QEventDispatcherGlib::processEvents (this=0x9fa6bc8, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0xb6000823 in QEventLoop::processEvents (this=this@entry=0x98f33268, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6000b49 in QEventLoop::exec (this=this@entry=0x98f33268, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5eed23d in QThread::exec (this=0xa0b1d98) at thread/qthread.cpp:537
#9  0x9a7928c7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0xb5eefb6f in QThreadPrivate::start (arg=0xa0b1d98) at thread/qthread_unix.cpp:349
#11 0xb20c8f70 in start_thread (arg=0x98f33b40) at pthread_create.c:312
#12 0xb75c370e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 1 (Thread 0xaed97740 (LWP 3234)):
[KCrash Handler]
#7  0x9e9e8d96 in ?? () from /usr/lib/kde4/plasma_applet_bubblemon.so
#8  0xb72a7d5a in Plasma::Applet::paint (this=0x98f3d18, painter=0xbf9ecc54, option=0x93e84f8, widget=0x0) at ../../plasma/applet.cpp:1466
#9  0xb5b7e0b2 in _q_paintItem (item=item@entry=0x98f3d20, painter=painter@entry=0xbf9ecc54, option=0x93e84f8, widget=widget@entry=0x0, useWindowOpacity=useWindowOpacity@entry=false, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4335
#10 0xb5b8f7de in _q_paintIntoCache (pix=pix@entry=0xbf9ecd94, item=<optimized out>, pixmapExposed=..., itemToPixmap=..., renderHints=..., option=0x93e84f8, painterStateProtection=painterStateProtection@entry=true) at graphicsview/qgraphicsscene.cpp:4373
#11 0xb5b91781 in QGraphicsScenePrivate::drawItemHelper (this=0x93e83a8, item=item@entry=0x98f3d20, painter=0xbf9eed14, option=0x93e84f8, widget=0xa48a090, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4694
#12 0xb5b9288b in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x98f3d20, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0xbf9ed110, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4966
#13 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x98f3d20, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#14 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f34a08, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#15 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f34a08, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#16 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f37100, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#17 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f37100, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#18 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f07870, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#19 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f07870, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#20 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f08248, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#21 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f08248, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#22 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f07338, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#23 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f07338, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#24 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f04038, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#25 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f04038, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#26 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9f02510, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#27 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9f02510, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#28 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9a9ebd0, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0x0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=false) at graphicsview/qgraphicsscene.cpp:4996
#29 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x9a9ebd0, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#30 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x996b950, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0xbf9ee820, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4996
#31 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x93e83a8, item=0x996b950, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=1, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4857
#32 0xb5b924ec in QGraphicsScenePrivate::draw (this=0x93e83a8, item=0x9940530, painter=0xbf9eed14, viewTransform=0xbf9eed90, transformPtr=transformPtr@entry=0xbf9eeab0, exposedRegion=0xa1fdb04, widget=0xa48a090, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4996
#33 0xb5b93015 in QGraphicsScenePrivate::drawSubtreeRecursive (this=this@entry=0x93e83a8, item=0x9940530, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090, parentOpacity=parentOpacity@entry=1, effectTransform=effectTransform@entry=0x0) at graphicsview/qgraphicsscene.cpp:4857
#34 0xb5b9377e in QGraphicsScenePrivate::drawItems (this=0x93e83a8, painter=0xbf9eed14, viewTransform=0xbf9eed90, exposedRegion=0xa1fdb04, widget=0xa48a090) at graphicsview/qgraphicsscene.cpp:4739
#35 0xb5bb43f4 in QGraphicsView::paintEvent (this=<optimized out>, event=<optimized out>) at graphicsview/qgraphicsview.cpp:3471
#36 0xb5567135 in QWidget::event (this=this@entry=0xa488c00, event=event@entry=0xbf9ef2e8) at kernel/qwidget.cpp:8533
#37 0xb596d78c in QFrame::event (this=this@entry=0xa488c00, e=e@entry=0xbf9ef2e8) at widgets/qframe.cpp:557
#38 0xb59fbe48 in QAbstractScrollArea::viewportEvent (this=this@entry=0xa488c00, e=e@entry=0xbf9ef2e8) at widgets/qabstractscrollarea.cpp:1043
#39 0xb5bb3107 in QGraphicsView::viewportEvent (this=<optimized out>, event=<optimized out>) at graphicsview/qgraphicsview.cpp:2866
#40 0xb59fc0c6 in viewportEvent (event=0xbf9ef2e8, this=<optimized out>) at widgets/qabstractscrollarea_p.h:100
#41 QAbstractScrollAreaFilter::eventFilter (this=0x99743a0, o=0xa48a090, e=0xbf9ef2e8) at widgets/qabstractscrollarea_p.h:116
#42 0xb6001fbe in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x94223c8, receiver=receiver@entry=0xa48a090, event=event@entry=0xbf9ef2e8) at kernel/qcoreapplication.cpp:1063
#43 0xb550d7d1 in QApplicationPrivate::notify_helper (this=0x94223c8, receiver=0xa48a090, e=0xbf9ef2e8) at kernel/qapplication.cpp:4563
#44 0xb55142d3 in QApplication::notify (this=0x9413248, receiver=receiver@entry=0xa48a090, e=e@entry=0xbf9ef2e8) at kernel/qapplication.cpp:4353
#45 0xb66760a4 in KApplication::notify (this=0x9413248, receiver=0xa48a090, event=0xbf9ef2e8) at ../../kdeui/kernel/kapplication.cpp:311
#46 0xb6001e4a in QCoreApplication::notifyInternal (this=0x9413248, receiver=0xa48a090, event=0xbf9ef2e8) at kernel/qcoreapplication.cpp:953
#47 0xb5560e61 in sendSpontaneousEvent (event=0xbf9ef2e8, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#48 QWidgetPrivate::drawWidget (this=0xa290368, pdev=0x9a98740, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0xa2e7c90) at kernel/qwidget.cpp:5599
#49 0xb5561961 in QWidgetPrivate::paintSiblingsRecursive (this=this@entry=0xa1fd7b8, pdev=0x9a98740, siblings=..., index=<optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0xa2e7c90) at kernel/qwidget.cpp:5808
#50 0xb55609fa in QWidgetPrivate::drawWidget (this=0xa1fd7b8, pdev=0x9a98740, rgn=..., offset=..., flags=flags@entry=5, sharedPainter=sharedPainter@entry=0x0, backingStore=backingStore@entry=0xa2e7c90) at kernel/qwidget.cpp:5652
#51 0xb574df9d in QWidgetBackingStore::sync (this=0xa2e7c90) at painting/qbackingstore.cpp:1373
#52 0xb555501b in QWidgetPrivate::syncBackingStore (this=this@entry=0xa1fd7b8) at kernel/qwidget.cpp:1894
#53 0xb5566b7c in QWidget::event (this=this@entry=0xa488c00, event=event@entry=0xaf24bb0) at kernel/qwidget.cpp:8680
#54 0xb596d78c in QFrame::event (this=this@entry=0xa488c00, e=0xaf24bb0) at widgets/qframe.cpp:557
#55 0xb59fbd0f in QAbstractScrollArea::event (this=this@entry=0xa488c00, e=e@entry=0xaf24bb0) at widgets/qabstractscrollarea.cpp:996
#56 0xb5bb2f2c in QGraphicsView::event (this=0xa488c00, event=0xaf24bb0) at graphicsview/qgraphicsview.cpp:2740
#57 0xb550d7f4 in QApplicationPrivate::notify_helper (this=0x94223c8, receiver=0xa488c00, e=0xaf24bb0) at kernel/qapplication.cpp:4567
#58 0xb55142d3 in QApplication::notify (this=0x9413248, receiver=receiver@entry=0xa488c00, e=e@entry=0xaf24bb0) at kernel/qapplication.cpp:4353
#59 0xb66760a4 in KApplication::notify (this=0x9413248, receiver=0xa488c00, event=0xaf24bb0) at ../../kdeui/kernel/kapplication.cpp:311
#60 0xb6001e4a in QCoreApplication::notifyInternal (this=0x9413248, receiver=receiver@entry=0xa488c00, event=event@entry=0xaf24bb0) at kernel/qcoreapplication.cpp:953
#61 0xb600570d in sendEvent (event=0xaf24bb0, receiver=0xa488c00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#62 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0xa488c00, event_type=event_type@entry=77, data=0x934a130) at kernel/qcoreapplication.cpp:1577
#63 0xb6005c1c in QCoreApplication::sendPostedEvents (receiver=0xa488c00, event_type=event_type@entry=77) at kernel/qcoreapplication.cpp:1470
#64 0xb5b8700e in dispatchPendingUpdateRequests (this=0xa1fd7b8) at ../../include/QtGui/private/../../../src/gui/graphicsview/qgraphicsview_p.h:200
#65 QGraphicsScenePrivate::_q_processDirtyItems (this=0x93e83a8) at graphicsview/qgraphicsscene.cpp:515
#66 0xb5b8a7bb in QGraphicsScene::qt_static_metacall (_o=0x9d76f78, _id=-1217911756, _a=0xb1e82d8, _c=<optimized out>) at .moc/release-shared/moc_qgraphicsscene.cpp:106
#67 0xb60138aa in QMetaCallEvent::placeMetaCall (this=0xb0e3690, object=0x95b0138) at kernel/qobject.cpp:524
#68 0xb601b6fb in QObject::event (this=this@entry=0x95b0138, e=e@entry=0xb0e3690) at kernel/qobject.cpp:1194
#69 0xb5b98c9f in QGraphicsScene::event (this=0x95b0138, event=0xb0e3690) at graphicsview/qgraphicsscene.cpp:3565
#70 0xb550d7f4 in QApplicationPrivate::notify_helper (this=0x94223c8, receiver=0x95b0138, e=0xb0e3690) at kernel/qapplication.cpp:4567
#71 0xb55142d3 in QApplication::notify (this=0x9413248, receiver=receiver@entry=0x95b0138, e=e@entry=0xb0e3690) at kernel/qapplication.cpp:4353
#72 0xb66760a4 in KApplication::notify (this=0x9413248, receiver=0x95b0138, event=0xb0e3690) at ../../kdeui/kernel/kapplication.cpp:311
#73 0xb6001e4a in QCoreApplication::notifyInternal (this=0x9413248, receiver=receiver@entry=0x95b0138, event=event@entry=0xb0e3690) at kernel/qcoreapplication.cpp:953
#74 0xb600570d in sendEvent (event=0xb0e3690, receiver=0x95b0138) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#75 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x934a130) at kernel/qcoreapplication.cpp:1577
#76 0xb6005c1c in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#77 0xb603223e in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#78 postEventSourceDispatch (s=0x941f970) at kernel/qeventdispatcher_glib.cpp:287
#79 0xb1fac1e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#80 0xb1fac468 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#81 0xb1fac528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#82 0xb603193b in QEventDispatcherGlib::processEvents (this=this@entry=0x934aeb8, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#83 0xb55c25de in QGuiEventDispatcherGlib::processEvents (this=0x934aeb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#84 0xb6000823 in QEventLoop::processEvents (this=this@entry=0xbf9f0178, flags=...) at kernel/qeventloop.cpp:149
#85 0xb6000b49 in QEventLoop::exec (this=this@entry=0xbf9f0178, flags=...) at kernel/qeventloop.cpp:204
#86 0xb60068fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#87 0xb550ba24 in QApplication::exec () at kernel/qapplication.cpp:3828
#88 0xb76dcd27 in kdemain (argc=1, argv=0xbf9f0314) at ../../../../plasma/desktop/shell/main.cpp:126
#89 0x0804855b in main (argc=1, argv=0xbf9f0314) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 327851, bug 327700, bug 323388, bug 321711, bug 308817.

Reported using DrKonqi