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: Shutting down when the crash happened.
This has happened several times, even after updates were applied a day or so ago.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f0cf181d7a0 (LWP 1508))]

Thread 4 (Thread 0x7f0cd846c700 (LWP 1511)):
#0  0x00007f0cf10f4773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f0ce567ff68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce5680792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0cdc2bb516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f0ce56a52b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0ce618cefc in start_thread (arg=0x7f0cd846c700) at pthread_create.c:304
#6  0x00007f0cf110089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f0cc7ad9700 (LWP 1512)):
#0  0x00007f0ce618f03e in __pthread_mutex_lock (mutex=0x1ed2468) at pthread_mutex_lock.c:62
#1  0x00007f0ce567f023 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce567fdfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0ce5680429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0cee2e6f3e in QEventDispatcherGlib::processEvents (this=0x1ed2440, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f0cee2bacf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f0cee2baef7 in QEventLoop::exec (this=0x7f0cc7ad8db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f0cee1d227f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f0cee29dcbf in QInotifyFileSystemWatcherEngine::run (this=0x1ed12d0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f0cee1d4d05 in QThreadPrivate::start (arg=0x1ed12d0) at thread/qthread_unix.cpp:331
#10 0x00007f0ce618cefc in start_thread (arg=0x7f0cc7ad9700) at pthread_create.c:304
#11 0x00007f0cf110089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f0cc6eac700 (LWP 1513)):
#0  0x00007f0cf10f4773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f0ce567ff68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0ce5680429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0cee2e6f3e in QEventDispatcherGlib::processEvents (this=0x1f24500, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f0cee2bacf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f0cee2baef7 in QEventLoop::exec (this=0x7f0cc6eabdb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f0cee1d227f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f0cee29dcbf in QInotifyFileSystemWatcherEngine::run (this=0x1f1f200) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f0cee1d4d05 in QThreadPrivate::start (arg=0x1f1f200) at thread/qthread_unix.cpp:331
#9  0x00007f0ce618cefc in start_thread (arg=0x7f0cc6eac700) at pthread_create.c:304
#10 0x00007f0cf110089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0cf181d7a0 (LWP 1508)):
[KCrash Handler]
#6  0x00000000014863f8 in ?? ()
#7  0x00007f0cd1d94b96 in TaskGroupItem::~TaskGroupItem (this=0x152d620, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007f0cd1d94c49 in TaskGroupItem::~TaskGroupItem (this=0x152d620, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:83
#9  0x00007f0cee2d2a88 in QObject::event (this=0x152d620, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007f0cedc8a89b in QGraphicsWidget::event (this=0x152d620, event=0x2a48fa0) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007f0ced66c424 in notify_helper (e=0x2a48fa0, receiver=0x152d620, this=0x11cf040) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x11cf040, receiver=0x152d620, e=0x2a48fa0) at kernel/qapplication.cpp:4458
#13 0x00007f0ced671291 in QApplication::notify (this=0x11c7e70, receiver=0x152d620, e=0x2a48fa0) at kernel/qapplication.cpp:4365
#14 0x00007f0ceef6a126 in KApplication::notify (this=0x11c7e70, receiver=0x152d620, event=0x2a48fa0) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f0cee2bbafc in QCoreApplication::notifyInternal (this=0x11c7e70, receiver=0x152d620, event=0x2a48fa0) at kernel/qcoreapplication.cpp:787
#16 0x00007f0cee2bf51f in sendEvent (event=0x2a48fa0, receiver=0x152d620) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x114c430) at kernel/qcoreapplication.cpp:1428
#18 0x00007f0cee2bf7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007f0cf13ff1a3 in kdemain (argc=1, argv=0x7fffe433b648) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007f0cf104030d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffe433b648, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe433b638) at libc-start.c:226
#21 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 285715.

Possible duplicates by query: bug 286812, bug 286733, bug 286718, bug 286630, bug 286548.

Reported using DrKonqi