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

-- Information about the crash:
clicking from firefox application to anther one or clicking betwen applications

The crash does not seem to be reproducible.

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f448dc2a7c0 (LWP 1703))]

Thread 4 (Thread 0x7f44643ab700 (LWP 1704)):
#0  0x00007f448d509773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4481a93f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4481a94429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f448a6faf3e in QEventDispatcherGlib::processEvents (this=0x2c93810, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f448a6cecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f448a6ceef7 in QEventLoop::exec (this=0x7f44643aacd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f448a5e627f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f448a6b1cbf in QInotifyFileSystemWatcherEngine::run (this=0x2c93850) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f448a5e8d05 in QThreadPrivate::start (arg=0x2c93850) at thread/qthread_unix.cpp:331
#9  0x00007f447edad56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f44825a0efc in start_thread (arg=0x7f44643ab700) at pthread_create.c:304
#11 0x00007f448d51589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f4461aaf700 (LWP 1705)):
#0  0x00007f448d509773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4481a93f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4481a94429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f448a6faf3e in QEventDispatcherGlib::processEvents (this=0x2eb36d0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f448a6cecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f448a6ceef7 in QEventLoop::exec (this=0x7f4461aaecd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f448a5e627f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f448a6b1cbf in QInotifyFileSystemWatcherEngine::run (this=0x2d605e0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f448a5e8d05 in QThreadPrivate::start (arg=0x2d605e0) at thread/qthread_unix.cpp:331
#9  0x00007f447edad56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f44825a0efc in start_thread (arg=0x7f4461aaf700) at pthread_create.c:304
#11 0x00007f448d51589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4457e9b700 (LWP 1714)):
#0  0x00007f448d509773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4481a93f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4481a94792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4458979516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f4481ab92b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f447edad56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#6  0x00007f44825a0efc in start_thread (arg=0x7f4457e9b700) at pthread_create.c:304
#7  0x00007f448d51589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f448dc2a7c0 (LWP 1703)):
[KCrash Handler]
#6  isNull (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x4756ee0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f4472194112 in WindowTaskItem::publishIconGeometry (this=0x4671620) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f44721a2b7c in AbstractTaskItem::timerEvent (this=0x4671620, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f448a6e6789 in QObject::event (this=0x4671620, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f448a09e89b in QGraphicsWidget::event (this=0x4671620, event=0x7fff9c02dc30) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f4489a80424 in notify_helper (e=0x7fff9c02dc30, receiver=0x4671620, this=0x1a8c960) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x1a8c960, receiver=0x4671620, e=0x7fff9c02dc30) at kernel/qapplication.cpp:4458
#15 0x00007f4489a85291 in QApplication::notify (this=0x1a692d0, receiver=0x4671620, e=0x7fff9c02dc30) at kernel/qapplication.cpp:4365
#16 0x00007f448b37e126 in KApplication::notify (this=0x1a692d0, receiver=0x4671620, event=0x7fff9c02dc30) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f448a6cfafc in QCoreApplication::notifyInternal (this=0x1a692d0, receiver=0x4671620, event=0x7fff9c02dc30) at kernel/qcoreapplication.cpp:787
#18 0x00007f448a6fcd62 in sendEvent (event=0x7fff9c02dc30, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x1a8b150) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f448a6fa538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f4481a93a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f4481a94258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f4481a94429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f448a6faed6 in QEventDispatcherGlib::processEvents (this=0x19ccf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f4489b2807e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f448a6cecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f448a6ceef7 in QEventLoop::exec (this=0x7fff9c02dec0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f448a6d3789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f448d8141a3 in kdemain (argc=1, argv=0x7fff9c02e2a8) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f448d45530d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff9c02e2a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9c02e298) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291036, bug 291000, bug 290995, bug 290994, bug 290993.

Reported using DrKonqi