Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic-pae i686
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I was surfing Internet with Firefox when Plasma crashed. This error repeat 2 times.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Оболочка Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb03db720 (LWP 1956))]

Thread 3 (Thread 0xa93cbb70 (LWP 1957)):
#0  0xb305f190 in g_main_context_release () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb3060906 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb3060c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb65d8b37 in QEventDispatcherGlib::processEvents (this=0x8b53868, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0xb65a91dd in QEventLoop::processEvents (this=0xa93cb1f0, flags=...) at kernel/qeventloop.cpp:149
#5  0xb65a9421 in QEventLoop::exec (this=0xa93cb1f0, flags=...) at kernel/qeventloop.cpp:201
#6  0xb64ac90b in QThread::exec (this=0x8b51290) at thread/qthread.cpp:498
#7  0xb6589e2d in QInotifyFileSystemWatcherEngine::run (this=0x8b51290) at io/qfilesystemwatcher_inotify.cpp:248
#8  0xb64af7b3 in QThreadPrivate::start (arg=0x8b51290) at thread/qthread_unix.cpp:331
#9  0xb27c9a9c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00000000 in ?? ()

Thread 2 (Thread 0xa6560b70 (LWP 1963)):
#0  0xb317dd50 in __pthread_mutex_unlock_usercnt () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb779af54 in pthread_mutex_unlock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb3060785 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb3060f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xa6e5ccea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#5  0xb30875f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb27c9a9c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#7  0x00000000 in ?? ()

Thread 1 (Thread 0xb03db720 (LWP 1956)):
[KCrash Handler]
#7  isNull (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x9979aa0) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0xaed3f662 in WindowTaskItem::publishIconGeometry (this=0x9cc1418) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0xaed50688 in AbstractTaskItem::timerEvent (this=0x9cc1418, event=0xbf9c9f3c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0xb65c2994 in QObject::event (this=0x9cc1418, e=0xbf9c9f3c) at kernel/qobject.cpp:1181
#13 0xb6194bd4 in QGraphicsWidget::event (this=0x9cc1418, event=0xbf9c9f3c) at graphicsview/qgraphicswidget.cpp:1455
#14 0xb5ad5d54 in notify_helper (e=0xbf9c9f3c, receiver=0x9cc1418, this=0x82e3700) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x82e3700, receiver=0x9cc1418, e=0xbf9c9f3c) at kernel/qapplication.cpp:4458
#16 0xb5adb103 in QApplication::notify (this=0xbf9c9f3c, receiver=0x9cc1418, e=0xbf9c9f3c) at kernel/qapplication.cpp:3886
#17 0xb6c0f681 in KApplication::notify (this=0x82da198, receiver=0x9cc1418, event=0xbf9c9f3c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0xb65aa19e in QCoreApplication::notifyInternal (this=0x82da198, receiver=0x9cc1418, event=0xbf9c9f3c) at kernel/qcoreapplication.cpp:787
#19 0xb65dac10 in sendEvent (event=0xbf9c9f3c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x82e844c) at kernel/qeventdispatcher_unix.cpp:603
#21 0xb65d8155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x82e8480) at kernel/qeventdispatcher_glib.cpp:231
#23 0xb306025f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0xb3060990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb3060c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb65d8ada in QEventDispatcherGlib::processEvents (this=0x824c218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0xb5b8de3a in QGuiEventDispatcherGlib::processEvents (this=0x824c218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0xb65a91dd in QEventLoop::processEvents (this=0xbf9ca1b4, flags=...) at kernel/qeventloop.cpp:149
#29 0xb65a9421 in QEventLoop::exec (this=0xbf9ca1b4, flags=...) at kernel/qeventloop.cpp:201
#30 0xb65ae19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0xb5ad38f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0xb788718b in kdemain (argc=1, argv=0xbf9ca3b4) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbf9ca3b4) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 291241, bug 291225, bug 291218, bug 291217, bug 291212.

Reported using DrKonqi