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:
For two weeks my plasma crashes all the time especially when I switch between windows.

The crash can be reproduced every time.

-- Backtrace:
Application: Powłoka pulpitu Plazmy (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f09926ba7a0 (LWP 1817))]

Thread 5 (Thread 0x7f096bac7700 (LWP 1818)):
#0  0x00007f0991fa7913 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f098f14a671 in QProcessManager::run (this=0x7f098f49c580) at io/qprocess_unix.cpp:245
#2  0x00007f098f081d05 in QThreadPrivate::start (arg=0x7f098f49c580) at thread/qthread_unix.cpp:331
#3  0x00007f0987039efc in start_thread (arg=0x7f096bac7700) at pthread_create.c:304
#4  0x00007f0991fae89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f096a80e700 (LWP 1820)):
#0  0x00007f0991fa2773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f098652cf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f098652d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f098f193ed6 in QEventDispatcherGlib::processEvents (this=0x178ef40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007f098f167cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f098f167ef7 in QEventLoop::exec (this=0x7f096a80ddb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f098f07f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f098f14acbf in QInotifyFileSystemWatcherEngine::run (this=0x1783140) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f098f081d05 in QThreadPrivate::start (arg=0x1783140) at thread/qthread_unix.cpp:331
#9  0x00007f0987039efc in start_thread (arg=0x7f096a80e700) at pthread_create.c:304
#10 0x00007f0991fae89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f09617f9700 (LWP 1822)):
#0  0x00007f0991fa2773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f098652cf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f098652d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f098f193ed6 in QEventDispatcherGlib::processEvents (this=0x141ac10, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007f098f167cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f098f167ef7 in QEventLoop::exec (this=0x7f09617f8db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f098f07f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f098f14acbf in QInotifyFileSystemWatcherEngine::run (this=0x14262f0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f098f081d05 in QThreadPrivate::start (arg=0x14262f0) at thread/qthread_unix.cpp:331
#9  0x00007f0987039efc in start_thread (arg=0x7f09617f9700) at pthread_create.c:304
#10 0x00007f0991fae89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f095fc52700 (LWP 1824)):
#0  0x00007f0991fa2773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f098652cf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f098652d792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0960730516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f09865522b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0987039efc in start_thread (arg=0x7f095fc52700) at pthread_create.c:304
#6  0x00007f0991fae89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f09926ba7a0 (LWP 1817)):
[KCrash Handler]
#6  operator== (value=0, this=0xd) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x7fff8c4fba90) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x7fff8c4fba90) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f097323c112 in WindowTaskItem::publishIconGeometry (this=0x281a900) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f097324ab7c in AbstractTaskItem::timerEvent (this=0x281a900, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f098f17f789 in QObject::event (this=0x281a900, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007f098eb3789b in QGraphicsWidget::event (this=0x281a900, event=0x7fff8c4fc6e0) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f098e519424 in notify_helper (e=0x7fff8c4fc6e0, receiver=0x281a900, this=0x1122e80) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x1122e80, receiver=0x281a900, e=0x7fff8c4fc6e0) at kernel/qapplication.cpp:4458
#16 0x00007f098e51e291 in QApplication::notify (this=0x1106ba0, receiver=0x281a900, e=0x7fff8c4fc6e0) at kernel/qapplication.cpp:4365
#17 0x00007f098fe17126 in KApplication::notify (this=0x1106ba0, receiver=0x281a900, event=0x7fff8c4fc6e0) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f098f168afc in QCoreApplication::notifyInternal (this=0x1106ba0, receiver=0x281a900, event=0x7fff8c4fc6e0) at kernel/qcoreapplication.cpp:787
#19 0x00007f098f195d62 in sendEvent (event=0x7fff8c4fc6e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x1121150) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007f098f193514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 0x00007f098652ca5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f098652d258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f098652d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f098f193ed6 in QEventDispatcherGlib::processEvents (this=0x10a7f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f098e5c107e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f098f167cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f098f167ef7 in QEventLoop::exec (this=0x7fff8c4fc970, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f098f16c789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f09922ad1a3 in kdemain (argc=1, argv=0x7fff8c4fcd58) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f0991eee30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff8c4fcd58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff8c4fcd48) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 290427, bug 290300, bug 290280, bug 290218, bug 290213.

Reported using DrKonqi