Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
Finished skype call where I unsuccessfully attempted to share my screen with a tablet, I was calling.  Upon finishing the call, shell crashed.  Programs running: skype, firefox, dropbox, truecrypt, dolphin.  Good luck...

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f150c56b7c0 (LWP 2099))]

Thread 4 (Thread 0x7f14e2eda700 (LWP 2114)):
#0  0x00007f150be4b773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f15003d5f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f15003d6429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f150903cf3e in QEventDispatcherGlib::processEvents (this=0x2b11a10, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f1509010cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1509010ef7 in QEventLoop::exec (this=0x7f14e2ed9cd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f1508f2827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f1508ff3cbf in QInotifyFileSystemWatcherEngine::run (this=0x2b12cf0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f1508f2ad05 in QThreadPrivate::start (arg=0x2b12cf0) at thread/qthread_unix.cpp:331
#9  0x00007f14fd6ef56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f1500ee2efc in start_thread (arg=0x7f14e2eda700) at pthread_create.c:304
#11 0x00007f150be5789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f14dbfff700 (LWP 2115)):
#0  0x00007f1500ee503e in __pthread_mutex_lock (mutex=0x2d2fbe8) at pthread_mutex_lock.c:62
#1  0x00007f15003d6044 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f15003d6429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f150903cf3e in QEventDispatcherGlib::processEvents (this=0x2d2f6f0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f1509010cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1509010ef7 in QEventLoop::exec (this=0x7f14dbffecd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f1508f2827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f1508ff3cbf in QInotifyFileSystemWatcherEngine::run (this=0x2d2ab80) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f1508f2ad05 in QThreadPrivate::start (arg=0x2d2ab80) at thread/qthread_unix.cpp:331
#9  0x00007f14fd6ef56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f1500ee2efc in start_thread (arg=0x7f14dbfff700) at pthread_create.c:304
#11 0x00007f150be5789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f14d694d700 (LWP 2123)):
#0  0x00007f15003d4687 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f15003d5d81 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f15003d6792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f14d742b516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f15003fb2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f14fd6ef56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#6  0x00007f1500ee2efc in start_thread (arg=0x7f14d694d700) at pthread_create.c:304
#7  0x00007f150be5789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f150c56b7c0 (LWP 2099)):
[KCrash Handler]
#6  isNull (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x3d56030) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f14f0f3b112 in WindowTaskItem::publishIconGeometry (this=0x436eed0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f14f0f49b7c in AbstractTaskItem::timerEvent (this=0x436eed0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f1509028789 in QObject::event (this=0x436eed0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f15089e089b in QGraphicsWidget::event (this=0x436eed0, event=0x7fff380c69c0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f15083c2424 in notify_helper (e=0x7fff380c69c0, receiver=0x436eed0, this=0x16bb540) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x16bb540, receiver=0x436eed0, e=0x7fff380c69c0) at kernel/qapplication.cpp:4458
#15 0x00007f15083c7291 in QApplication::notify (this=0x16aecd0, receiver=0x436eed0, e=0x7fff380c69c0) at kernel/qapplication.cpp:4365
#16 0x00007f1509cc0126 in KApplication::notify (this=0x16aecd0, receiver=0x436eed0, event=0x7fff380c69c0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f1509011afc in QCoreApplication::notifyInternal (this=0x16aecd0, receiver=0x436eed0, event=0x7fff380c69c0) at kernel/qcoreapplication.cpp:787
#18 0x00007f150903ed62 in sendEvent (event=0x7fff380c69c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x16c2590) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f150903c538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f15003d5a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f15003d6258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f15003d6429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f150903ced6 in QEventDispatcherGlib::processEvents (this=0x1605f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f150846a07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f1509010cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f1509010ef7 in QEventLoop::exec (this=0x7fff380c6c50, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f1509015789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f150c1561a3 in kdemain (argc=1, argv=0x7fff380c7038) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f150bd9730d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff380c7038, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff380c7028) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 292512, bug 292479, bug 292434, bug 292417, bug 292361.

Reported using DrKonqi