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

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

Thread 1 (Thread 0xb78bcb20 (LWP 1746)):
[KCrash Handler]
#7  operator== (value=0, this=0xa) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#8  isNull (this=0xaf3d448) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#9  operator! (this=0xaf3d448) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#10 TaskManager::TaskItem::task (this=0xc0a4050) at ../../../libs/taskmanager/taskitem.cpp:113
#11 0x04c14662 in WindowTaskItem::publishIconGeometry (this=0xbf6ec00) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#12 0x04c25688 in AbstractTaskItem::timerEvent (this=0xbf6ec00, event=0xbff4a2dc) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#13 0x070fb994 in QObject::event (this=0xbf6ec00, e=0xbff4a2dc) at kernel/qobject.cpp:1181
#14 0x01c4bbd4 in QGraphicsWidget::event (this=0xbf6ec00, event=0xbff4a2dc) at graphicsview/qgraphicswidget.cpp:1455
#15 0x0158cd54 in notify_helper (e=0xbff4a2dc, receiver=0xbf6ec00, this=0x9bc0b38) at kernel/qapplication.cpp:4486
#16 QApplicationPrivate::notify_helper (this=0x9bc0b38, receiver=0xbf6ec00, e=0xbff4a2dc) at kernel/qapplication.cpp:4458
#17 0x01592103 in QApplication::notify (this=0xbff4a2dc, receiver=0xbf6ec00, e=0xbff4a2dc) at kernel/qapplication.cpp:3886
#18 0x0118f681 in KApplication::notify (this=0x9bac028, receiver=0xbf6ec00, event=0xbff4a2dc) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x070e319e in QCoreApplication::notifyInternal (this=0x9bac028, receiver=0xbf6ec00, event=0xbff4a2dc) at kernel/qcoreapplication.cpp:787
#20 0x07113c10 in sendEvent (event=0xbff4a2dc, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#21 QTimerInfoList::activateTimers (this=0x9bbd6b4) at kernel/qeventdispatcher_unix.cpp:603
#22 0x07111155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#23 idleTimerSourceDispatch (source=0x9bbcc00) at kernel/qeventdispatcher_glib.cpp:231
#24 0x0627025f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x06270990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x06270c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0x07111ada in QEventDispatcherGlib::processEvents (this=0x9b6a218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#28 0x01644e3a in QGuiEventDispatcherGlib::processEvents (this=0x9b6a218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x070e21dd in QEventLoop::processEvents (this=0xbff4a554, flags=...) at kernel/qeventloop.cpp:149
#30 0x070e2421 in QEventLoop::exec (this=0xbff4a554, flags=...) at kernel/qeventloop.cpp:201
#31 0x070e719d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#32 0x0158a8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#33 0x005e918b in kdemain (argc=1, argv=0xbff4a754) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x0804850b in main (argc=1, argv=0xbff4a754) at plasma-desktop_dummy.cpp:3

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78bcb20 (LWP 1746))]

Thread 4 (Thread 0xb1920b70 (LWP 1747)):
#0  0x0089f416 in __kernel_vsyscall ()
#1  0x0074240e in __GI___poll (fds=0xa431148, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#2  0x0627f34b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x06270896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x06270c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x07111b37 in QEventDispatcherGlib::processEvents (this=0xa430e90, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x070e21dd in QEventLoop::processEvents (this=0xb19202a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x070e2421 in QEventLoop::exec (this=0xb19202a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x06fe590b in QThread::exec (this=0xa42eac8) at thread/qthread.cpp:498
#9  0x070c2e2d in QInotifyFileSystemWatcherEngine::run (this=0xa42eac8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x06fe87b3 in QThreadPrivate::start (arg=0xa42eac8) at thread/qthread_unix.cpp:331
#11 0x06e0ad31 in start_thread (arg=0xb1920b70) at pthread_create.c:304
#12 0x007510ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xafe07b70 (LWP 1748)):
#0  0x00f23d10 in __GI_clock_gettime (clock_id=1, tp=0xafe07018) at ../sysdeps/unix/clock_gettime.c:116
#1  0x0703f7d5 in do_gettime (frac=0xafe07010, sec=0xafe07008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x071124b6 in QTimerInfoList::updateCurrentTime (this=0xa5c0db4) at kernel/qeventdispatcher_unix.cpp:339
#4  0x0711280a in QTimerInfoList::timerWait (this=0xa5c0db4, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x07111053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xafe0711c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x071110ed in timerSourcePrepare (source=0xa5c0d80, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x0626f88c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x06270637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x06270c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x07111b37 in QEventDispatcherGlib::processEvents (this=0x9f74a50, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x070e21dd in QEventLoop::processEvents (this=0xafe072a0, flags=...) at kernel/qeventloop.cpp:149
#12 0x070e2421 in QEventLoop::exec (this=0xafe072a0, flags=...) at kernel/qeventloop.cpp:201
#13 0x06fe590b in QThread::exec (this=0x9fb8558) at thread/qthread.cpp:498
#14 0x070c2e2d in QInotifyFileSystemWatcherEngine::run (this=0x9fb8558) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x06fe87b3 in QThreadPrivate::start (arg=0x9fb8558) at thread/qthread_unix.cpp:331
#16 0x06e0ad31 in start_thread (arg=0xafe07b70) at pthread_create.c:304
#17 0x007510ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xadb85b70 (LWP 1756)):
#0  0x06e0dd44 in __pthread_mutex_unlock_usercnt (mutex=0xaa2519c, decr=1) at pthread_mutex_unlock.c:52
#1  0x0075ef54 in pthread_mutex_unlock (mutex=0xaa2519c) at forward.c:184
#2  0x0626f87f in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x06270637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x06270f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x0594acea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x062975f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x06e0ad31 in start_thread (arg=0xadb85b70) at pthread_create.c:304
#8  0x007510ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb78bcb20 (LWP 1746)):
[KCrash Handler]
#7  operator== (value=0, this=0xa) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#8  isNull (this=0xaf3d448) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#9  operator! (this=0xaf3d448) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#10 TaskManager::TaskItem::task (this=0xc0a4050) at ../../../libs/taskmanager/taskitem.cpp:113
#11 0x04c14662 in WindowTaskItem::publishIconGeometry (this=0xbf6ec00) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#12 0x04c25688 in AbstractTaskItem::timerEvent (this=0xbf6ec00, event=0xbff4a2dc) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#13 0x070fb994 in QObject::event (this=0xbf6ec00, e=0xbff4a2dc) at kernel/qobject.cpp:1181
#14 0x01c4bbd4 in QGraphicsWidget::event (this=0xbf6ec00, event=0xbff4a2dc) at graphicsview/qgraphicswidget.cpp:1455
#15 0x0158cd54 in notify_helper (e=0xbff4a2dc, receiver=0xbf6ec00, this=0x9bc0b38) at kernel/qapplication.cpp:4486
#16 QApplicationPrivate::notify_helper (this=0x9bc0b38, receiver=0xbf6ec00, e=0xbff4a2dc) at kernel/qapplication.cpp:4458
#17 0x01592103 in QApplication::notify (this=0xbff4a2dc, receiver=0xbf6ec00, e=0xbff4a2dc) at kernel/qapplication.cpp:3886
#18 0x0118f681 in KApplication::notify (this=0x9bac028, receiver=0xbf6ec00, event=0xbff4a2dc) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x070e319e in QCoreApplication::notifyInternal (this=0x9bac028, receiver=0xbf6ec00, event=0xbff4a2dc) at kernel/qcoreapplication.cpp:787
#20 0x07113c10 in sendEvent (event=0xbff4a2dc, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#21 QTimerInfoList::activateTimers (this=0x9bbd6b4) at kernel/qeventdispatcher_unix.cpp:603
#22 0x07111155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#23 idleTimerSourceDispatch (source=0x9bbcc00) at kernel/qeventdispatcher_glib.cpp:231
#24 0x0627025f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x06270990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x06270c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0x07111ada in QEventDispatcherGlib::processEvents (this=0x9b6a218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#28 0x01644e3a in QGuiEventDispatcherGlib::processEvents (this=0x9b6a218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x070e21dd in QEventLoop::processEvents (this=0xbff4a554, flags=...) at kernel/qeventloop.cpp:149
#30 0x070e2421 in QEventLoop::exec (this=0xbff4a554, flags=...) at kernel/qeventloop.cpp:201
#31 0x070e719d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#32 0x0158a8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#33 0x005e918b in kdemain (argc=1, argv=0xbff4a754) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x0804850b in main (argc=1, argv=0xbff4a754) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 290185, bug 290152, bug 290081, bug 290071, bug 289985.

Reported using DrKonqi