Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.1 (4.7.1)
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: everytime I shutdown my laptop system, the plasma desktop crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f88b98637a0 (LWP 2096))]

Thread 4 (Thread 0x7f88973e7700 (LWP 2098)):
#0  __pthread_getspecific (key=0) at pthread_getspecific.c:58
#1  0x00007f88b622208c in get_thread_data () at thread/qthread_unix.cpp:172
#2  QThreadData::current () at thread/qthread_unix.cpp:210
#3  0x00007f88b63346a9 in postEventSourcePrepare (s=0x142ea40, timeout=0x0) at kernel/qeventdispatcher_glib.cpp:254
#4  0x00007f88ad6cd734 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f88ad6cdf82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f88ad6ce429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f88b6334f3e in QEventDispatcherGlib::processEvents (this=0x1430230, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#8  0x00007f88b6308cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#9  0x00007f88b6308ef7 in QEventLoop::exec (this=0x7f88973e6db0, flags=...) at kernel/qeventloop.cpp:201
#10 0x00007f88b622027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#11 0x00007f88b62ebcbf in QInotifyFileSystemWatcherEngine::run (this=0x14312d0) at io/qfilesystemwatcher_inotify.cpp:248
#12 0x00007f88b6222d05 in QThreadPrivate::start (arg=0x14312d0) at thread/qthread_unix.cpp:331
#13 0x00007f88ae1daefc in start_thread (arg=0x7f88973e7700) at pthread_create.c:304
#14 0x00007f88b914c89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f8894906700 (LWP 2099)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f8894905ad0 in ?? ()
#2  0x00007fffce5d27e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f888aa70700 (LWP 2107)):
#0  0x00007f88b9140773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f88ad6cdf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f88ad6ce792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f888b54e516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f88ad6f32b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f88ae1daefc in start_thread (arg=0x7f888aa70700) at pthread_create.c:304
#6  0x00007f88b914c89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f88b98637a0 (LWP 2096)):
[KCrash Handler]
#6  0x00000000009c4fda in ?? ()
#7  0x00007f88a02dba96 in TaskGroupItem::~TaskGroupItem (this=0x1b919a0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007f88a02dbb49 in TaskGroupItem::~TaskGroupItem (this=0x1b919a0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:83
#9  0x00007f88b6320a88 in QObject::event (this=0x1b919a0, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007f88b5cd889b in QGraphicsWidget::event (this=0x1b919a0, event=0x1861200) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007f88b56ba424 in notify_helper (e=0x1861200, receiver=0x1b919a0, this=0x9c6060) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x9c6060, receiver=0x1b919a0, e=0x1861200) at kernel/qapplication.cpp:4458
#13 0x00007f88b56bf291 in QApplication::notify (this=0x9b9c90, receiver=0x1b919a0, e=0x1861200) at kernel/qapplication.cpp:4365
#14 0x00007f88b6fb81e6 in KApplication::notify (this=0x9b9c90, receiver=0x1b919a0, event=0x1861200) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f88b6309afc in QCoreApplication::notifyInternal (this=0x9b9c90, receiver=0x1b919a0, event=0x1861200) at kernel/qcoreapplication.cpp:787
#16 0x00007f88b630d51f in sendEvent (event=0x1861200, receiver=0x1b919a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x959430) at kernel/qcoreapplication.cpp:1428
#18 0x00007f88b630d7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007f88b944b1a3 in kdemain (argc=1, argv=0x7fffce421988) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007f88b908c30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffce421988, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffce421978) at libc-start.c:226
#21 0x0000000000400671 in _start ()

Possible duplicates by query: bug 284635, bug 284630, bug 284615, bug 284594, bug 284150.

Reported using DrKonqi