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 x86_64
Distribution: Ubuntu 11.10

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

I was switching to a window from a grouped set of windows and I think that the window was closed(automatically) the moment I clicked it, then plasma crashed.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f805b7df7c0 (LWP 2708))]

Thread 3 (Thread 0x7f8035969700 (LWP 2709)):
#0  __pthread_mutex_lock (mutex=0x2b25c08) at pthread_mutex_lock.c:127
#1  0x00007f804f64e414 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f80582b4f3e in QEventDispatcherGlib::processEvents (this=0x2afc2a0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#3  0x00007f8058288cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#4  0x00007f8058288ef7 in QEventLoop::exec (this=0x7f8035968cd0, flags=...) at kernel/qeventloop.cpp:201
#5  0x00007f80581a027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#6  0x00007f805826bcbf in QInotifyFileSystemWatcherEngine::run (this=0x2b23f60) at io/qfilesystemwatcher_inotify.cpp:248
#7  0x00007f80581a2d05 in QThreadPrivate::start (arg=0x2b23f60) at thread/qthread_unix.cpp:331
#8  0x00007f804c96756c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#9  0x00007f805015aefc in start_thread (arg=0x7f8035969700) at pthread_create.c:304
#10 0x00007f805b0cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8031cfb700 (LWP 2711)):
#0  0x00007f805b0c3773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f804f64df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f804f64e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f80582b4f3e in QEventDispatcherGlib::processEvents (this=0x31d59f0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f8058288cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f8058288ef7 in QEventLoop::exec (this=0x7f8031cfacd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f80581a027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f805826bcbf in QInotifyFileSystemWatcherEngine::run (this=0x31d4c40) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f80581a2d05 in QThreadPrivate::start (arg=0x31d4c40) at thread/qthread_unix.cpp:331
#9  0x00007f804c96756c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007f805015aefc in start_thread (arg=0x7f8031cfb700) at pthread_create.c:304
#11 0x00007f805b0cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f805b7df7c0 (LWP 2708)):
[KCrash Handler]
#6  operator== (value=0, this=) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x3600314a40) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x3600314a40) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f803d2de112 in WindowTaskItem::publishIconGeometry (this=0x2f60500) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f803d2ecb7c in AbstractTaskItem::timerEvent (this=0x2f60500, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f80582a0789 in QObject::event (this=0x2f60500, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007f8057c5889b in QGraphicsWidget::event (this=0x2f60500, event=0x7fff4ebcfd20) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f805763a424 in notify_helper (e=0x7fff4ebcfd20, receiver=0x2f60500, this=0x1f7c360) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x1f7c360, receiver=0x2f60500, e=0x7fff4ebcfd20) at kernel/qapplication.cpp:4458
#16 0x00007f805763f291 in QApplication::notify (this=0x1f51070, receiver=0x2f60500, e=0x7fff4ebcfd20) at kernel/qapplication.cpp:4365
#17 0x00007f8058f38126 in KApplication::notify (this=0x1f51070, receiver=0x2f60500, event=0x7fff4ebcfd20) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f8058289afc in QCoreApplication::notifyInternal (this=0x1f51070, receiver=0x2f60500, event=0x7fff4ebcfd20) at kernel/qcoreapplication.cpp:787
#19 0x00007f80582b6d62 in sendEvent (event=0x7fff4ebcfd20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x1f74670) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007f80582b4538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007f804f64da5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f804f64e258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f804f64e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f80582b4ed6 in QEventDispatcherGlib::processEvents (this=0x1eaef40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f80576e207e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f8058288cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f8058288ef7 in QEventLoop::exec (this=0x7fff4ebcffb0, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f805828d789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007f805b3ce1a3 in kdemain (argc=1, argv=0x7fff4ebd0398) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007f805b00f30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff4ebd0398, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff4ebd0388) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 290213, bug 290185, bug 290152, bug 290081, bug 290071.

Reported using DrKonqi