Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
After closing 2 Skype instances from the tray I noticed them stayed in the task bar. Then I decided to close the group of chat windows with right-click and Plasma crashed after I pressed "Close group".

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f38fee1a7a0 (LWP 1705))]

Thread 4 (Thread 0x7f38dc18a700 (LWP 1707)):
#0  0x00007f38fe6fc773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f38f2c87f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f38f2c88429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f38fb8eef3e in QEventDispatcherGlib::processEvents (this=0x7f38d40008b0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f38fb8c2cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f38fb8c2ef7 in QEventLoop::exec (this=0x7f38dc189db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f38fb7da27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f38fb8a5cbf in QInotifyFileSystemWatcherEngine::run (this=0x1d95600) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f38fb7dcd05 in QThreadPrivate::start (arg=0x1d95600) at thread/qthread_unix.cpp:331
#9  0x00007f38f3794efc in start_thread (arg=0x7f38dc18a700) at pthread_create.c:304
#10 0x00007f38fe70889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f38d96fb700 (LWP 1708)):
#0  0x00007f38f379703e in __pthread_mutex_lock (mutex=0x1fb7d18) at pthread_mutex_lock.c:62
#1  0x00007f38f2c878c2 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f38f2c88258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f38f2c88429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f38fb8eef3e in QEventDispatcherGlib::processEvents (this=0x1fb7cf0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f38fb8c2cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f38fb8c2ef7 in QEventLoop::exec (this=0x7f38d96fadb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f38fb7da27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f38fb8a5cbf in QInotifyFileSystemWatcherEngine::run (this=0x1fb7120) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f38fb7dcd05 in QThreadPrivate::start (arg=0x1fb7120) at thread/qthread_unix.cpp:331
#10 0x00007f38f3794efc in start_thread (arg=0x7f38d96fb700) at pthread_create.c:304
#11 0x00007f38fe70889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f38cf90a700 (LWP 1716)):
#0  0x00007f38f379703e in __pthread_mutex_lock (mutex=0x7f38d400dce8) at pthread_mutex_lock.c:62
#1  0x00007f38f2c878c2 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f38f2c88258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f38f2c88792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f38d03e8516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007f38f2cad2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f38f3794efc in start_thread (arg=0x7f38cf90a700) at pthread_create.c:304
#7  0x00007f38fe70889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f38fee1a7a0 (LWP 1705)):
[KCrash Handler]
#6  TaskManager::Task::classClass (this=0x0) at ../../../libs/taskmanager/task_x11.cpp:74
#7  0x00007f38e5430d76 in TaskManager::ToggleLauncherActionImpl::ToggleLauncherActionImpl (this=0x3567340, parent=<optimized out>, item=0x48e5be0, strategy=<optimized out>) at ../../../libs/taskmanager/taskactions.cpp:351
#8  0x00007f38e5431218 in TaskManager::AdvancedMenu::AdvancedMenu (this=0x4fa7290, parent=<optimized out>, item=0x48e5be0, strategy=0x19e8e20) at ../../../libs/taskmanager/taskactions.cpp:295
#9  0x00007f38e5431e8a in TaskManager::BasicMenu::BasicMenu (this=0x4966820, parent=<optimized out>, item=0x48e5be0, strategy=0x19e8e20, visualizationActions=...) at ../../../libs/taskmanager/taskactions.cpp:440
#10 0x00007f38e5432529 in TaskManager::BasicMenu::BasicMenu (this=0x7fff24e1c0a0, parent=<optimized out>, group=0x4763e90, strategy=0x19e8e20, visualizationActions=...) at ../../../libs/taskmanager/taskactions.cpp:462
#11 0x00007f38e5677a91 in contextMenuEvent (e=<optimized out>, this=0x5055c60) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:436
#12 TaskGroupItem::contextMenuEvent (this=0x5055c60, e=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:404
#13 0x00007f38fb23b7b5 in QGraphicsItem::sceneEvent (this=0x5055c70, event=0x7fff24e1c720) at graphicsview/qgraphicsitem.cpp:6700
#14 0x00007f38fb26375e in QGraphicsScene::contextMenuEvent (this=<optimized out>, contextMenuEvent=0x7fff24e1c720) at graphicsview/qgraphicsscene.cpp:3609
#15 0x00007f38fb272834 in QGraphicsScene::event (this=0x13f5b20, event=0x7fff24e1c720) at graphicsview/qgraphicsscene.cpp:3407
#16 0x00007f38fac74424 in notify_helper (e=0x7fff24e1c720, receiver=0x13f5b20, this=0x13f0460) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x13f0460, receiver=0x13f5b20, e=0x7fff24e1c720) at kernel/qapplication.cpp:4458
#18 0x00007f38fac79291 in QApplication::notify (this=0x13df990, receiver=0x13f5b20, e=0x7fff24e1c720) at kernel/qapplication.cpp:4365
#19 0x00007f38fc572126 in KApplication::notify (this=0x13df990, receiver=0x13f5b20, event=0x7fff24e1c720) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f38fb8c3afc in QCoreApplication::notifyInternal (this=0x13df990, receiver=0x13f5b20, event=0x7fff24e1c720) at kernel/qcoreapplication.cpp:787
#21 0x00007f38fb2884fb in sendEvent (event=0x7fff24e1c720, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QGraphicsView::contextMenuEvent (this=0x2486010, event=0x7fff24e1ce30) at graphicsview/qgraphicsview.cpp:2890
#23 0x00007f38facc4a00 in QWidget::event (this=0x2486010, event=0x7fff24e1ce30) at kernel/qwidget.cpp:8462
#24 0x00007f38fb06d4f6 in QFrame::event (this=0x2486010, e=0x7fff24e1ce30) at widgets/qframe.cpp:557
#25 0x00007f38fb290d3b in QGraphicsView::viewportEvent (this=0x2486010, event=0x7fff24e1ce30) at graphicsview/qgraphicsview.cpp:2864
#26 0x00007f38fb8c3c88 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x2584ff0, event=0x7fff24e1ce30) at kernel/qcoreapplication.cpp:902
#27 0x00007f38fac743ef in notify_helper (e=0x7fff24e1ce30, receiver=0x2584ff0, this=0x13f0460) at kernel/qapplication.cpp:4482
#28 QApplicationPrivate::notify_helper (this=0x13f0460, receiver=0x2584ff0, e=0x7fff24e1ce30) at kernel/qapplication.cpp:4458
#29 0x00007f38fac79779 in QApplication::notify (this=<optimized out>, receiver=0x2584ff0, e=0x7fff24e1ce30) at kernel/qapplication.cpp:4126
#30 0x00007f38fc572126 in KApplication::notify (this=0x13df990, receiver=0x2584ff0, event=0x7fff24e1ce30) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007f38fb8c3afc in QCoreApplication::notifyInternal (this=0x13df990, receiver=0x2584ff0, event=0x7fff24e1ce30) at kernel/qcoreapplication.cpp:787
#32 0x00007f38facf49aa in sendSpontaneousEvent (event=0x7fff24e1ce30, receiver=0x2584ff0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#33 QETWidget::translateMouseEvent (this=0x2486010, event=<optimized out>) at kernel/qapplication_x11.cpp:4573
#34 0x00007f38facf38be in QApplication::x11ProcessEvent (this=0x13df990, event=0x7fff24e1d620) at kernel/qapplication_x11.cpp:3690
#35 0x00007f38fad1c412 in x11EventSourceDispatch (s=0x13eca20, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00007f38f2c87a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f38f2c88258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f38f2c88429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f38fb8eeed6 in QEventDispatcherGlib::processEvents (this=0x137cf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#40 0x00007f38fad1c07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007f38fb8c2cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007f38fb8c2ef7 in QEventLoop::exec (this=0x7fff24e1d9f0, flags=...) at kernel/qeventloop.cpp:201
#43 0x00007f38fb8c7789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#44 0x00007f38fea071a3 in kdemain (argc=1, argv=0x7fff24e1ddd8) at ../../../../plasma/desktop/shell/main.cpp:120
#45 0x00007f38fe64830d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff24e1ddd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff24e1ddc8) at libc-start.c:226
#46 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 277033.

Possible duplicates by query: bug 285221, bug 282770, bug 282020, bug 280987, bug 279530.

Reported using DrKonqi