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:
Using Facebook chat with a few programs open, kde crashed. Not quite sure what happened.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fc2953b07c0 (LWP 1711))]

Thread 4 (Thread 0x7fc2716d5700 (LWP 1712)):
#0  0x00007fc294c90773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fc28921af68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc28921b429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc291e81f3e in QEventDispatcherGlib::processEvents (this=0x135e1f0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fc291e55cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc291e55ef7 in QEventLoop::exec (this=0x7fc2716d4cd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fc291d6d27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fc291e38cbf in QInotifyFileSystemWatcherEngine::run (this=0x135c970) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fc291d6fd05 in QThreadPrivate::start (arg=0x135c970) at thread/qthread_unix.cpp:331
#9  0x00007fc28653456c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007fc289d27efc in start_thread (arg=0x7fc2716d5700) at pthread_create.c:304
#11 0x00007fc294c9c89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fc2681fb700 (LWP 1715)):
#0  0x00007fc294c90773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fc28921af68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc28921b429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc291e81f3e in QEventDispatcherGlib::processEvents (this=0x1e30d30, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fc291e55cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fc291e55ef7 in QEventLoop::exec (this=0x7fc2681facd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fc291d6d27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fc291e38cbf in QInotifyFileSystemWatcherEngine::run (this=0x1e2ff50) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fc291d6fd05 in QThreadPrivate::start (arg=0x1e2ff50) at thread/qthread_unix.cpp:331
#9  0x00007fc28653456c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007fc289d27efc in start_thread (arg=0x7fc2681fb700) at pthread_create.c:304
#11 0x00007fc294c9c89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc264fac700 (LWP 1722)):
#0  0x00007fc294c90773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fc28921af68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc28921b792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc265a8a516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fc2892402b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc28653456c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#6  0x00007fc289d27efc in start_thread (arg=0x7fc264fac700) at pthread_create.c:304
#7  0x00007fc294c9c89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc2953b07c0 (LWP 1711)):
[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=0x2837de0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007fc279dba068 in WindowTaskItem::publishIconGeometry (this=0x2a06200, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#10 0x00007fc279dc9d24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#11 0x00007fc279dc9aa5 in publishIconGeometry (this=0x30231d0) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#12 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#13 0x00007fc279dc8b7c in AbstractTaskItem::timerEvent (this=0x30231d0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#14 0x00007fc291e6d789 in QObject::event (this=0x30231d0, e=<optimized out>) at kernel/qobject.cpp:1181
#15 0x00007fc29182589b in QGraphicsWidget::event (this=0x30231d0, event=0x7fff210e9420) at graphicsview/qgraphicswidget.cpp:1455
#16 0x00007fc291207424 in notify_helper (e=0x7fff210e9420, receiver=0x30231d0, this=0x9c99c0) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x9c99c0, receiver=0x30231d0, e=0x7fff210e9420) at kernel/qapplication.cpp:4458
#18 0x00007fc29120c291 in QApplication::notify (this=0x9b86f0, receiver=0x30231d0, e=0x7fff210e9420) at kernel/qapplication.cpp:4365
#19 0x00007fc292b05126 in KApplication::notify (this=0x9b86f0, receiver=0x30231d0, event=0x7fff210e9420) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007fc291e56afc in QCoreApplication::notifyInternal (this=0x9b86f0, receiver=0x30231d0, event=0x7fff210e9420) at kernel/qcoreapplication.cpp:787
#21 0x00007fc291e83d62 in sendEvent (event=0x7fff210e9420, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x9c6e90) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007fc291e81538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#25 0x00007fc28921aa5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fc28921b258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fc28921b429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fc291e81ed6 in QEventDispatcherGlib::processEvents (this=0x912f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007fc2912af07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007fc291e55cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007fc291e55ef7 in QEventLoop::exec (this=0x7fff210e96b0, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007fc291e5a789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x00007fc294f9b1a3 in kdemain (argc=1, argv=0x7fff210e9a98) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x00007fc294bdc30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff210e9a98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff210e9a88) at libc-start.c:226
#35 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291447, bug 291439, bug 291431, bug 291419, bug 291409.

Reported using DrKonqi