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:

nothing special, plasma crashes from time to time, then restarts. I am aware that there are similar bug reports, but they are marked as resolved.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f7f8eb4a7c0 (LWP 2336))]

Thread 4 (Thread 0x7f7f69e3c700 (LWP 2338)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f7f69e3b9f0 in ?? ()
#2  0x00007fffa7ab57e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 3 (Thread 0x7f7f62fbf700 (LWP 2339)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f7f62fbe9f0 in ?? ()
#2  0x00007fffa7ab57e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f7f5d90c700 (LWP 2347)):
#0  0x00007f7f8e437773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f7f829c1f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7f829c2792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7f5e3ea516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f7f829e72b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7f7fcdb56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#6  0x00007f7f834ceefc in start_thread (arg=0x7f7f5d90c700) at pthread_create.c:304
#7  0x00007f7f8e44389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7f8eb4a7c0 (LWP 2336)):
[KCrash Handler]
#6  operator== (value=0, this=0xc0000000e) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x21694e0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x21694e0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f7f72a69068 in WindowTaskItem::publishIconGeometry (this=0x3b81bf0, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#11 0x00007f7f72a78d24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#12 0x00007f7f72a78aa5 in publishIconGeometry (this=0x3c400b0) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#13 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#14 0x00007f7f72a77b7c in AbstractTaskItem::timerEvent (this=0x3c400b0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#15 0x00007f7f8b614789 in QObject::event (this=0x3c400b0, e=<optimized out>) at kernel/qobject.cpp:1181
#16 0x00007f7f8afcc89b in QGraphicsWidget::event (this=0x3c400b0, event=0x7fffa7a508c0) at graphicsview/qgraphicswidget.cpp:1455
#17 0x00007f7f8a9ae424 in notify_helper (e=0x7fffa7a508c0, receiver=0x3c400b0, this=0x1bdd6b0) at kernel/qapplication.cpp:4486
#18 QApplicationPrivate::notify_helper (this=0x1bdd6b0, receiver=0x3c400b0, e=0x7fffa7a508c0) at kernel/qapplication.cpp:4458
#19 0x00007f7f8a9b3291 in QApplication::notify (this=0x1bc9c80, receiver=0x3c400b0, e=0x7fffa7a508c0) at kernel/qapplication.cpp:4365
#20 0x00007f7f8c2ac126 in KApplication::notify (this=0x1bc9c80, receiver=0x3c400b0, event=0x7fffa7a508c0) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x00007f7f8b5fdafc in QCoreApplication::notifyInternal (this=0x1bc9c80, receiver=0x3c400b0, event=0x7fffa7a508c0) at kernel/qcoreapplication.cpp:787
#22 0x00007f7f8b62ad62 in sendEvent (event=0x7fffa7a508c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QTimerInfoList::activateTimers (this=0x1bdcb70) at kernel/qeventdispatcher_unix.cpp:603
#24 0x00007f7f8b628514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#25 0x00007f7f829c1a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f7f829c2258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f7f829c2429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f7f8b628ed6 in QEventDispatcherGlib::processEvents (this=0x1b1cf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f7f8aa5607e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f7f8b5fccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f7f8b5fcef7 in QEventLoop::exec (this=0x7fffa7a50b50, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f7f8b601789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x00007f7f8e7421a3 in kdemain (argc=1, argv=0x7fffa7a50f38) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x00007f7f8e38330d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffa7a50f38, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa7a50f28) at libc-start.c:226
#35 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291918, bug 291911, bug 291905, bug 291893, bug 291785.

Reported using DrKonqi