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:

This crash happens almost every time I shut down or restart my system. It looks like the possible related bug is what is happening here too. I haven't noticed exactly but I do close a group of related taskbar items many a time.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fdd71d707a0 (LWP 1814))]

Thread 3 (Thread 0x7fdd4f597700 (LWP 1815)):
#0  0x00007fdd65bda0a4 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fdd65bdadfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdd65bdb429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdd6e841f3e in QEventDispatcherGlib::processEvents (this=0x2e83b40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fdd6e815cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fdd6e815ef7 in QEventLoop::exec (this=0x7fdd4f596db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fdd6e72d27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fdd6e7f8cbf in QInotifyFileSystemWatcherEngine::run (this=0x2e816f0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fdd6e72fd05 in QThreadPrivate::start (arg=0x2e816f0) at thread/qthread_unix.cpp:331
#9  0x00007fdd666e7efc in start_thread (arg=0x7fdd4f597700) at pthread_create.c:304
#10 0x00007fdd7165b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fdd4cbe3700 (LWP 1816)):
#0  0x00007fdd7164f773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fdd65bdaf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fdd65bdb429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fdd6e841f3e in QEventDispatcherGlib::processEvents (this=0x27feb50, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fdd6e815cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fdd6e815ef7 in QEventLoop::exec (this=0x7fdd4cbe2db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fdd6e72d27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fdd6e7f8cbf in QInotifyFileSystemWatcherEngine::run (this=0x28da190) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fdd6e72fd05 in QThreadPrivate::start (arg=0x28da190) at thread/qthread_unix.cpp:331
#9  0x00007fdd666e7efc in start_thread (arg=0x7fdd4cbe3700) at pthread_create.c:304
#10 0x00007fdd7165b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fdd71d707a0 (LWP 1814)):
[KCrash Handler]
#6  0x00000000027fb41a in ?? ()
#7  0x00007fdd57c58b96 in TaskGroupItem::~TaskGroupItem (this=0x4388d20, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007fdd57c58c49 in TaskGroupItem::~TaskGroupItem (this=0x4388d20, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:83
#9  0x00007fdd6e82da88 in QObject::event (this=0x4388d20, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007fdd6e1e589b in QGraphicsWidget::event (this=0x4388d20, event=0x3473320) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007fdd6dbc7424 in notify_helper (e=0x3473320, receiver=0x4388d20, this=0x2645220) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x2645220, receiver=0x4388d20, e=0x3473320) at kernel/qapplication.cpp:4458
#13 0x00007fdd6dbcc291 in QApplication::notify (this=0x2634150, receiver=0x4388d20, e=0x3473320) at kernel/qapplication.cpp:4365
#14 0x00007fdd6f4c5126 in KApplication::notify (this=0x2634150, receiver=0x4388d20, event=0x3473320) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007fdd6e816afc in QCoreApplication::notifyInternal (this=0x2634150, receiver=0x4388d20, event=0x3473320) at kernel/qcoreapplication.cpp:787
#16 0x00007fdd6e81a51f in sendEvent (event=0x3473320, receiver=0x4388d20) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x25d2430) at kernel/qcoreapplication.cpp:1428
#18 0x00007fdd6e81a7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007fdd7195a1a3 in kdemain (argc=1, argv=0x7fff03fbb6d8) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007fdd7159b30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff03fbb6d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff03fbb6c8) at libc-start.c:226
#21 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 275286.

Possible duplicates by query: bug 284791, bug 284635, bug 284630, bug 284615, bug 284594.

Reported using DrKonqi