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 closing som Dolphin windows

- Unusual behavior I noticed:
All the time windows' title bar is flashing between its appareance and the wallpaper's image

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f15ef4957a0 (LWP 1744))]

Thread 4 (Thread 0x7f15cc999700 (LWP 1745)):
#0  0x00007f15eed76773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f15e3300f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f15e3301429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f15ebf67f3e in QEventDispatcherGlib::processEvents (this=0x20ae050, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f15ebf3bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f15ebf3bef7 in QEventLoop::exec (this=0x7f15cc998db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f15ebe5327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f15ebf1ecbf in QInotifyFileSystemWatcherEngine::run (this=0x20b70b0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f15ebe55d05 in QThreadPrivate::start (arg=0x20b70b0) at thread/qthread_unix.cpp:331
#9  0x00007f15e3e0defc in start_thread (arg=0x7f15cc999700) at pthread_create.c:304
#10 0x00007f15eed8289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f15c5fcb700 (LWP 1746)):
#0  0x00007f15eed76773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f15e3300f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f15e3301429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f15ebf67f3e in QEventDispatcherGlib::processEvents (this=0x2249590, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f15ebf3bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f15ebf3bef7 in QEventLoop::exec (this=0x7f15c5fcadb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f15ebe5327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f15ebf1ecbf in QInotifyFileSystemWatcherEngine::run (this=0x22487d0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f15ebe55d05 in QThreadPrivate::start (arg=0x22487d0) at thread/qthread_unix.cpp:331
#9  0x00007f15e3e0defc in start_thread (arg=0x7f15c5fcb700) at pthread_create.c:304
#10 0x00007f15eed8289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f15c023f700 (LWP 1754)):
#0  0x00007f15eed76773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f15e3300f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f15e3301792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f15c0d1d516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f15e33262b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f15e3e0defc in start_thread (arg=0x7f15c023f700) at pthread_create.c:304
#6  0x00007f15eed8289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f15ef4957a0 (LWP 1744)):
[KCrash Handler]
#6  isNull (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x2be7760) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f15d52c4112 in WindowTaskItem::publishIconGeometry (this=0x367c890) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f15d52d2b7c in AbstractTaskItem::timerEvent (this=0x367c890, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f15ebf53789 in QObject::event (this=0x367c890, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f15eb90b89b in QGraphicsWidget::event (this=0x367c890, event=0x7fff5bbdaa40) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f15eb2ed424 in notify_helper (e=0x7fff5bbdaa40, receiver=0x367c890, this=0x145ec70) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x145ec70, receiver=0x367c890, e=0x7fff5bbdaa40) at kernel/qapplication.cpp:4458
#15 0x00007f15eb2f2291 in QApplication::notify (this=0x1458b90, receiver=0x367c890, e=0x7fff5bbdaa40) at kernel/qapplication.cpp:4365
#16 0x00007f15ecbeb126 in KApplication::notify (this=0x1458b90, receiver=0x367c890, event=0x7fff5bbdaa40) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f15ebf3cafc in QCoreApplication::notifyInternal (this=0x1458b90, receiver=0x367c890, event=0x7fff5bbdaa40) at kernel/qcoreapplication.cpp:787
#18 0x00007f15ebf69d62 in sendEvent (event=0x7fff5bbdaa40, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x145c8b0) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f15ebf67538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f15e3300a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f15e3301258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f15e3301429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f15ebf67ed6 in QEventDispatcherGlib::processEvents (this=0x13dff40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f15eb39507e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f15ebf3bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f15ebf3bef7 in QEventLoop::exec (this=0x7fff5bbdacd0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f15ebf40789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f15ef0811a3 in kdemain (argc=1, argv=0x7fff5bbdb0b8) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f15eecc230d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff5bbdb0b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff5bbdb0a8) at libc-start.c:226
#32 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 285913.

Possible duplicates by query: bug 292242, bug 292220, bug 292186, bug 292177, bug 292153.

Reported using DrKonqi