Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
when i close an app, it often remains in the panel as it it were still open. (the icon does not go away when it is closed) when i click on the icon it causes this error. this only happens with fancy panel

- Unusual behavior I noticed:
screen goes black and plasma restarts (not 100% sure this is what it is doing, but fairly sure) in any case after a second of black, everything seems to return to normal with the icon gone.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f6374bb87a0 (LWP 5106))]

Thread 3 (Thread 0x7f635aa56700 (LWP 5108)):
#0  0x00007f6374492773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6368a1df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6368a1e792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f635f4ef516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f6368a432b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f636952aefc in start_thread (arg=0x7f635aa56700) at pthread_create.c:304
#6  0x00007f637449e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6341a6d700 (LWP 5130)):
#0  0x00007f6374492773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6368a1df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6368a1e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6371684f3e in QEventDispatcherGlib::processEvents (this=0x2910010, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6371658cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6371658ef7 in QEventLoop::exec (this=0x7f6341a6cdb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f637157027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f637163bcbf in QInotifyFileSystemWatcherEngine::run (this=0x2a03040) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f6371572d05 in QThreadPrivate::start (arg=0x2a03040) at thread/qthread_unix.cpp:331
#9  0x00007f636952aefc in start_thread (arg=0x7f6341a6d700) at pthread_create.c:304
#10 0x00007f637449e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6374bb87a0 (LWP 5106)):
[KCrash Handler]
#6  TaskManager::Task::classClass (this=0x0) at ../../../libs/taskmanager/task_x11.cpp:74
#7  0x00007f634e925d76 in TaskManager::ToggleLauncherActionImpl::ToggleLauncherActionImpl (this=0x2f34460, parent=<optimized out>, item=0x2059d30, strategy=<optimized out>) at ../../../libs/taskmanager/taskactions.cpp:351
#8  0x00007f634e926218 in TaskManager::AdvancedMenu::AdvancedMenu (this=0x29d2450, parent=<optimized out>, item=0x2059d30, strategy=0x22b4c40) at ../../../libs/taskmanager/taskactions.cpp:295
#9  0x00007f634e926e8a in TaskManager::BasicMenu::BasicMenu (this=0x22e07a0, parent=<optimized out>, item=0x2059d30, strategy=0x22b4c40, visualizationActions=...) at ../../../libs/taskmanager/taskactions.cpp:440
#10 0x00007f634eb7a783 in ?? () from /usr/lib/kde4/plasma_applet_fancytasks.so
#11 0x00007f634eb70dc9 in ?? () from /usr/lib/kde4/plasma_applet_fancytasks.so
#12 0x00007f634eb71110 in ?? () from /usr/lib/kde4/plasma_applet_fancytasks.so
#13 0x00007f6370fd17b5 in QGraphicsItem::sceneEvent (this=0x2f239e0, event=0x7fffc204ecb0) at graphicsview/qgraphicsitem.cpp:6700
#14 0x00007f6370ff975e in QGraphicsScene::contextMenuEvent (this=<optimized out>, contextMenuEvent=0x7fffc204ecb0) at graphicsview/qgraphicsscene.cpp:3609
#15 0x00007f6371008834 in QGraphicsScene::event (this=0x1fae560, event=0x7fffc204ecb0) at graphicsview/qgraphicsscene.cpp:3407
#16 0x00007f6370a0a424 in notify_helper (e=0x7fffc204ecb0, receiver=0x1fae560, this=0x1db4e50) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x1db4e50, receiver=0x1fae560, e=0x7fffc204ecb0) at kernel/qapplication.cpp:4458
#18 0x00007f6370a0f291 in QApplication::notify (this=0x1dad8e0, receiver=0x1fae560, e=0x7fffc204ecb0) at kernel/qapplication.cpp:4365
#19 0x00007f6372308126 in KApplication::notify (this=0x1dad8e0, receiver=0x1fae560, event=0x7fffc204ecb0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f6371659afc in QCoreApplication::notifyInternal (this=0x1dad8e0, receiver=0x1fae560, event=0x7fffc204ecb0) at kernel/qcoreapplication.cpp:787
#21 0x00007f637101e4fb in sendEvent (event=0x7fffc204ecb0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QGraphicsView::contextMenuEvent (this=0x2908f60, event=0x7fffc204f3c0) at graphicsview/qgraphicsview.cpp:2890
#23 0x00007f6370a5aa00 in QWidget::event (this=0x2908f60, event=0x7fffc204f3c0) at kernel/qwidget.cpp:8462
#24 0x00007f6370e034f6 in QFrame::event (this=0x2908f60, e=0x7fffc204f3c0) at widgets/qframe.cpp:557
#25 0x00007f6371026d3b in QGraphicsView::viewportEvent (this=0x2908f60, event=0x7fffc204f3c0) at graphicsview/qgraphicsview.cpp:2864
#26 0x00007f6371659c88 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x29716f0, event=0x7fffc204f3c0) at kernel/qcoreapplication.cpp:902
#27 0x00007f6370a0a3ef in notify_helper (e=0x7fffc204f3c0, receiver=0x29716f0, this=0x1db4e50) at kernel/qapplication.cpp:4482
#28 QApplicationPrivate::notify_helper (this=0x1db4e50, receiver=0x29716f0, e=0x7fffc204f3c0) at kernel/qapplication.cpp:4458
#29 0x00007f6370a0f779 in QApplication::notify (this=<optimized out>, receiver=0x29716f0, e=0x7fffc204f3c0) at kernel/qapplication.cpp:4126
#30 0x00007f6372308126 in KApplication::notify (this=0x1dad8e0, receiver=0x29716f0, event=0x7fffc204f3c0) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007f6371659afc in QCoreApplication::notifyInternal (this=0x1dad8e0, receiver=0x29716f0, event=0x7fffc204f3c0) at kernel/qcoreapplication.cpp:787
#32 0x00007f6370a8a9aa in sendSpontaneousEvent (event=0x7fffc204f3c0, receiver=0x29716f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#33 QETWidget::translateMouseEvent (this=0x2908f60, event=<optimized out>) at kernel/qapplication_x11.cpp:4573
#34 0x00007f6370a898be in QApplication::x11ProcessEvent (this=0x1dad8e0, event=0x7fffc204fbb0) at kernel/qapplication_x11.cpp:3690
#35 0x00007f6370ab2412 in x11EventSourceDispatch (s=0x1db7db0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00007f6368a1da5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f6368a1e258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f6368a1e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f6371684ed6 in QEventDispatcherGlib::processEvents (this=0x1d41f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#40 0x00007f6370ab207e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007f6371658cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007f6371658ef7 in QEventLoop::exec (this=0x7fffc204ff80, flags=...) at kernel/qeventloop.cpp:201
#43 0x00007f637165d789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#44 0x00007f637479d1a3 in kdemain (argc=1, argv=0x7fffc2050368) at ../../../../plasma/desktop/shell/main.cpp:120
#45 0x00007f63743de30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffc2050368, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffc2050358) at libc-start.c:226
#46 0x0000000000400671 in _start ()

Possible duplicates by query: bug 285858, bug 285681, bug 285221, bug 282770, bug 282020.

Reported using DrKonqi