Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I closed all applications 
- Unusual behavior I noticed:
quite often I collect this type of error message
- Custom settings of the application:
do not understand the question

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fbde32107a0 (LWP 2224))]

Thread 5 (Thread 0x7fbdbf32c700 (LWP 2225)):
#0  0x00007fbde2af3773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fbdd707df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbdd707e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbddfce4f3e in QEventDispatcherGlib::processEvents (this=0x3239720, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbddfcb8cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fbddfcb8ef7 in QEventLoop::exec (this=0x7fbdbf32bdb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fbddfbd027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fbddfc9bcbf in QInotifyFileSystemWatcherEngine::run (this=0x3210cc0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fbddfbd2d05 in QThreadPrivate::start (arg=0x3210cc0) at thread/qthread_unix.cpp:331
#9  0x00007fbdd7b8aefc in start_thread (arg=0x7fbdbf32c700) at pthread_create.c:304
#10 0x00007fbde2aff89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fbdbca7f700 (LWP 2226)):
#0  0x00007fbdd707ce7c in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbdd707ddfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbdd707e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbddfce4f3e in QEventDispatcherGlib::processEvents (this=0x344ec40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbddfcb8cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fbddfcb8ef7 in QEventLoop::exec (this=0x7fbdbca7edb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fbddfbd027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fbddfc9bcbf in QInotifyFileSystemWatcherEngine::run (this=0x344def0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fbddfbd2d05 in QThreadPrivate::start (arg=0x344def0) at thread/qthread_unix.cpp:331
#9  0x00007fbdd7b8aefc in start_thread (arg=0x7fbdbca7f700) at pthread_create.c:304
#10 0x00007fbde2aff89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fbdaefb2700 (LWP 2237)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbdde18cc2c in WTF::TCMalloc_PageHeap::scavengerThread (this=0x7fbddeb43220) at wtf/FastMalloc.cpp:2495
#2  0x00007fbdde18cd59 in WTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at wtf/FastMalloc.cpp:1618
#3  0x00007fbdd7b8aefc in start_thread (arg=0x7fbdaefb2700) at pthread_create.c:304
#4  0x00007fbde2aff89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fbdae699700 (LWP 2238)):
#0  0x00007fbde2af3773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fbdd707df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbdd707e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbddfce4f3e in QEventDispatcherGlib::processEvents (this=0x3e154e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbddfcb8cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fbddfcb8ef7 in QEventLoop::exec (this=0x7fbdae698de0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fbddfbd027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fbddfbd2d05 in QThreadPrivate::start (arg=0x3e14760) at thread/qthread_unix.cpp:331
#8  0x00007fbdd7b8aefc in start_thread (arg=0x7fbdae699700) at pthread_create.c:304
#9  0x00007fbde2aff89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fbde32107a0 (LWP 2224)):
[KCrash Handler]
#6  0x000000000426a808 in ?? ()
#7  0x00007fbdc992bb96 in TaskGroupItem::~TaskGroupItem (this=0x3a528f0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007fbdc992bc59 in TaskGroupItem::~TaskGroupItem (this=0x3a528f0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:84
#9  0x00007fbddfcd0a88 in QObject::event (this=0x3a528f0, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007fbddf68889b in QGraphicsWidget::event (this=0x3a528f0, event=0x350cca0) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007fbddf06a424 in notify_helper (e=0x350cca0, receiver=0x3a528f0, this=0x25a3be0) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x25a3be0, receiver=0x3a528f0, e=0x350cca0) at kernel/qapplication.cpp:4458
#13 0x00007fbddf06f291 in QApplication::notify (this=0x2556c90, receiver=0x3a528f0, e=0x350cca0) at kernel/qapplication.cpp:4365
#14 0x00007fbde0968126 in KApplication::notify (this=0x2556c90, receiver=0x3a528f0, event=0x350cca0) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007fbddfcb9afc in QCoreApplication::notifyInternal (this=0x2556c90, receiver=0x3a528f0, event=0x350cca0) at kernel/qcoreapplication.cpp:787
#16 0x00007fbddfcbd51f in sendEvent (event=0x350cca0, receiver=0x3a528f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x2522430) at kernel/qcoreapplication.cpp:1428
#18 0x00007fbddfcbd7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007fbde2dfe1a3 in kdemain (argc=1, argv=0x7fff753fb418) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007fbde2a3f30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff753fb418, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff753fb408) at libc-start.c:226
#21 0x0000000000400671 in _start ()

Possible duplicates by query: bug 286630, bug 286548, bug 286544, bug 286532, bug 286335.

Reported using DrKonqi