Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I was shutting down the computer. When it logged out the system hung with a black screen and the bug report program started.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8b0bfb27a0 (LWP 1609))]

Thread 4 (Thread 0x7f8ae8b34700 (LWP 1614)):
#0  0x00007f8b0b893773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8affe1df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8affe1e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8b08a84f3e in QEventDispatcherGlib::processEvents (this=0x2211c90, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f8b08a58cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f8b08a58ef7 in QEventLoop::exec (this=0x7f8ae8b33db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f8b0897027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f8b08a3bcbf in QInotifyFileSystemWatcherEngine::run (this=0x2210030) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f8b08972d05 in QThreadPrivate::start (arg=0x2210030) at thread/qthread_unix.cpp:331
#9  0x00007f8b0092aefc in start_thread (arg=0x7f8ae8b34700) at pthread_create.c:304
#10 0x00007f8b0b89f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f8ae20a7700 (LWP 1615)):
#0  0x00007f8b08a844f9 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:170
#1  0x00007f8affe1cff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8affe1ddfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8affe1e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8b08a84f3e in QEventDispatcherGlib::processEvents (this=0x23bfb10, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f8b08a58cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f8b08a58ef7 in QEventLoop::exec (this=0x7f8ae20a6db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f8b0897027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f8b08a3bcbf in QInotifyFileSystemWatcherEngine::run (this=0x23bedf0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f8b08972d05 in QThreadPrivate::start (arg=0x23bedf0) at thread/qthread_unix.cpp:331
#10 0x00007f8b0092aefc in start_thread (arg=0x7f8ae20a7700) at pthread_create.c:304
#11 0x00007f8b0b89f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8adc31b700 (LWP 1623)):
#0  0x00007f8b0b893773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8affe1df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8affe1e792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8adcdf9516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f8affe432b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8b0092aefc in start_thread (arg=0x7f8adc31b700) at pthread_create.c:304
#6  0x00007f8b0b89f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8b0bfb27a0 (LWP 1609)):
[KCrash Handler]
#6  0x0000000003ae339a in ?? ()
#7  0x00007f8af1b44b96 in TaskGroupItem::~TaskGroupItem (this=0x300d780, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007f8af1b44c59 in TaskGroupItem::~TaskGroupItem (this=0x300d780, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:84
#9  0x00007f8b08a70a88 in QObject::event (this=0x300d780, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007f8b0842889b in QGraphicsWidget::event (this=0x300d780, event=0x307ead0) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007f8b07e0a424 in notify_helper (e=0x307ead0, receiver=0x300d780, this=0x177cee0) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x177cee0, receiver=0x300d780, e=0x307ead0) at kernel/qapplication.cpp:4458
#13 0x00007f8b07e0f291 in QApplication::notify (this=0x175cf10, receiver=0x300d780, e=0x307ead0) at kernel/qapplication.cpp:4365
#14 0x00007f8b09708126 in KApplication::notify (this=0x175cf10, receiver=0x300d780, event=0x307ead0) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007f8b08a59afc in QCoreApplication::notifyInternal (this=0x175cf10, receiver=0x300d780, event=0x307ead0) at kernel/qcoreapplication.cpp:787
#16 0x00007f8b08a5d51f in sendEvent (event=0x307ead0, receiver=0x300d780) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x1704430) at kernel/qcoreapplication.cpp:1428
#18 0x00007f8b08a5d7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007f8b0bb9e1a3 in kdemain (argc=1, argv=0x7fff78627e68) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007f8b0b7df30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff78627e68, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff78627e58) at libc-start.c:226
#21 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289450, bug 289423, bug 289372, bug 289368, bug 289350.

Reported using DrKonqi