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 just try to change one window to another. This crash is repeated all the time.

The crash can be reproduced every time.

-- Backtrace:
Application: Powłoka pulpitu Plazmy (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f071a65e7a0 (LWP 1902))]

Thread 4 (Thread 0x7f06f27b2700 (LWP 1907)):
#0  0x00007f0719f46773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f070e4d0f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f070e4d1429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0717137f3e in QEventDispatcherGlib::processEvents (this=0x285ab40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f071710bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f071710bef7 in QEventLoop::exec (this=0x7f06f27b1db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f071702327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f07170eecbf in QInotifyFileSystemWatcherEngine::run (this=0x2855300) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f0717025d05 in QThreadPrivate::start (arg=0x2855300) at thread/qthread_unix.cpp:331
#9  0x00007f070efddefc in start_thread (arg=0x7f06f27b2700) at pthread_create.c:304
#10 0x00007f0719f5289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f06e97f9700 (LWP 1909)):
#0  0x00007f0719f46773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f070e4d0f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f070e4d1429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0717137f3e in QEventDispatcherGlib::processEvents (this=0x240ae70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f071710bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f071710bef7 in QEventLoop::exec (this=0x7f06e97f8db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f071702327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f07170eecbf in QInotifyFileSystemWatcherEngine::run (this=0x2428da0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f0717025d05 in QThreadPrivate::start (arg=0x2428da0) at thread/qthread_unix.cpp:331
#9  0x00007f070efddefc in start_thread (arg=0x7f06e97f9700) at pthread_create.c:304
#10 0x00007f0719f5289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f06e7c52700 (LWP 1911)):
#0  0x00007f0719f46773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f070e4d0f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f070e4d1792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f06e8730516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f070e4f62b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f070efddefc in start_thread (arg=0x7f06e7c52700) at pthread_create.c:304
#6  0x00007f0719f5289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f071a65e7a0 (LWP 1902)):
[KCrash Handler]
#6  operator== (value=0, this=0xd) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x3785250) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x3785250) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f06fb1e0112 in WindowTaskItem::publishIconGeometry (this=0x3cd7f40) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f06fb1eeb7c in AbstractTaskItem::timerEvent (this=0x3cd7f40, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f0717123789 in QObject::event (this=0x3cd7f40, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007f0716adb89b in QGraphicsWidget::event (this=0x3cd7f40, event=0x7fffeb7d28c0) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f07164bd424 in notify_helper (e=0x7fffeb7d28c0, receiver=0x3cd7f40, this=0x2178fa0) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x2178fa0, receiver=0x3cd7f40, e=0x7fffeb7d28c0) at kernel/qapplication.cpp:4458
#16 0x00007f07164c2291 in QApplication::notify (this=0x215c780, receiver=0x3cd7f40, e=0x7fffeb7d28c0) at kernel/qapplication.cpp:4365
#17 0x00007f0717dbb126 in KApplication::notify (this=0x215c780, receiver=0x3cd7f40, event=0x7fffeb7d28c0) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f071710cafc in QCoreApplication::notifyInternal (this=0x215c780, receiver=0x3cd7f40, event=0x7fffeb7d28c0) at kernel/qcoreapplication.cpp:787
#19 0x00007f0717139d62 in sendEvent (event=0x7fffeb7d28c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x21770d0) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007f0717137538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007f070e4d0a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f070e4d1258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f070e4d1429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f0717137ed6 in QEventDispatcherGlib::processEvents (this=0x20fdf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f071656507e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f071710bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f071710bef7 in QEventLoop::exec (this=0x7fffeb7d2b50, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f0717110789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007f071a2511a3 in kdemain (argc=1, argv=0x7fffeb7d2f38) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007f0719e9230d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffeb7d2f38, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffeb7d2f28) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 290813, bug 290810, bug 290717, bug 290686, bug 290664.

Reported using DrKonqi