Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic-pae i686
Distribution: Ubuntu 11.10

-- Information about the crash:
plasma desktop crashes randomly.

sometimes it get restarted automatcly, and some times it won't.

no special action i performed, it just do that randomly

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb1eabb20 (LWP 25522))]

Thread 4 (Thread 0xafdffb70 (LWP 25524)):
#0  0xb7736424 in __kernel_vsyscall ()
#1  0xb75e540e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2ed634b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2ec7896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2ec7f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb0887cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb2eee5f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb2fe1d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0xb75f40ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xaa01ab70 (LWP 25525)):
#0  0xb643f30c in postEventSourcePrepare (s=0x8d705a8, timeout=0xaa01a11c) at kernel/qeventdispatcher_glib.cpp:261
#1  0xb2ec688c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb2ec7637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2ec7c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb643fb37 in QEventDispatcherGlib::processEvents (this=0x8d6f820, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#5  0xb64101dd in QEventLoop::processEvents (this=0xaa01a2a0, flags=...) at kernel/qeventloop.cpp:149
#6  0xb6410421 in QEventLoop::exec (this=0xaa01a2a0, flags=...) at kernel/qeventloop.cpp:201
#7  0xb631390b in QThread::exec (this=0x8d6d9a0) at thread/qthread.cpp:498
#8  0xb63f0e2d in QInotifyFileSystemWatcherEngine::run (this=0x8d6d9a0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0xb63167b3 in QThreadPrivate::start (arg=0x8d6d9a0) at thread/qthread_unix.cpp:331
#10 0xb2fe1d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#11 0xb75f40ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa855cb70 (LWP 25526)):
#0  0xb2ec680b in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb2ec7637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb2ec7c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb643fb37 in QEventDispatcherGlib::processEvents (this=0x8dcd2c8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0xb64101dd in QEventLoop::processEvents (this=0xa855c2a0, flags=...) at kernel/qeventloop.cpp:149
#5  0xb6410421 in QEventLoop::exec (this=0xa855c2a0, flags=...) at kernel/qeventloop.cpp:201
#6  0xb631390b in QThread::exec (this=0x8da9028) at thread/qthread.cpp:498
#7  0xb63f0e2d in QInotifyFileSystemWatcherEngine::run (this=0x8da9028) at io/qfilesystemwatcher_inotify.cpp:248
#8  0xb63167b3 in QThreadPrivate::start (arg=0x8da9028) at thread/qthread_unix.cpp:331
#9  0xb2fe1d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#10 0xb75f40ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb1eabb20 (LWP 25522)):
[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=0x910e8b0) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0xb0b28590 in WindowTaskItem::publishIconGeometry (this=0x905b078, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#11 0xb0b3ab24 in TaskGroupItem::publishIconGeometry (this=0x9c2e9f0, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1438
#12 0xb0b3a801 in publishIconGeometry (this=0x9c2e9f0) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#13 TaskGroupItem::publishIconGeometry (this=0x9c2e9f0) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#14 0xb0b39688 in AbstractTaskItem::timerEvent (this=0x9c2e9f0, event=0xbf9fad4c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#15 0xb6429994 in QObject::event (this=0x9c2e9f0, e=0xbf9fad4c) at kernel/qobject.cpp:1181
#16 0xb5ffbbd4 in QGraphicsWidget::event (this=0x9c2e9f0, event=0xbf9fad4c) at graphicsview/qgraphicswidget.cpp:1455
#17 0xb593cd54 in notify_helper (e=0xbf9fad4c, receiver=0x9c2e9f0, this=0x857d2d0) at kernel/qapplication.cpp:4486
#18 QApplicationPrivate::notify_helper (this=0x857d2d0, receiver=0x9c2e9f0, e=0xbf9fad4c) at kernel/qapplication.cpp:4458
#19 0xb5942103 in QApplication::notify (this=0xbf9fad4c, receiver=0x9c2e9f0, e=0xbf9fad4c) at kernel/qapplication.cpp:3886
#20 0xb6a76681 in KApplication::notify (this=0x8570880, receiver=0x9c2e9f0, event=0xbf9fad4c) at ../../kdeui/kernel/kapplication.cpp:311
#21 0xb641119e in QCoreApplication::notifyInternal (this=0x8570880, receiver=0x9c2e9f0, event=0xbf9fad4c) at kernel/qcoreapplication.cpp:787
#22 0xb6441c10 in sendEvent (event=0xbf9fad4c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QTimerInfoList::activateTimers (this=0x8581d2c) at kernel/qeventdispatcher_unix.cpp:603
#24 0xb643f122 in timerSourceDispatch (source=0x8581cf8) at kernel/qeventdispatcher_glib.cpp:184
#25 0xb2ec725f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb2ec7990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0xb2ec7c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#28 0xb643fada in QEventDispatcherGlib::processEvents (this=0x8532218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#29 0xb59f4e3a in QGuiEventDispatcherGlib::processEvents (this=0x8532218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#30 0xb64101dd in QEventLoop::processEvents (this=0xbf9fafc4, flags=...) at kernel/qeventloop.cpp:149
#31 0xb6410421 in QEventLoop::exec (this=0xbf9fafc4, flags=...) at kernel/qeventloop.cpp:201
#32 0xb641519d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0xb593a8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#34 0xb76eb18b in kdemain (argc=1, argv=0xbf9fb1c4) at ../../../../plasma/desktop/shell/main.cpp:120
#35 0x0804850b in main (argc=1, argv=0xbf9fb1c4) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 290505, bug 290499, bug 290453, bug 290449, bug 290427.

Reported using DrKonqi