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:
Selecting a tab on Task Manager to move from one program windows (aMSN) to another (xsane).

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f26ebcdd7a0 (LWP 1795))]

Thread 3 (Thread 0x7f26cfb6f700 (LWP 1797)):
#0  0x00007fffb676692c in clock_gettime ()
#1  0x00007f26dfe0307b in __GI_clock_gettime (clock_id=1, tp=0x7f26cfb6eb20) at ../sysdeps/unix/clock_gettime.c:100
#2  0x00007f26e86f3074 in do_gettime (frac=0x7f26cfb6eb38, sec=0x7f26cfb6eb30) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007f26e87b56ed in QTimerInfoList::updateCurrentTime (this=0xfeea70) at kernel/qeventdispatcher_unix.cpp:339
#5  0x00007f26e87b5a33 in QTimerInfoList::timerWait (this=0xfeea70, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#6  0x00007f26e87b444c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7f26cfb6ec1c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007f26e87b44f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007f26dfb4cff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f26dfb4ddfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f26dfb4e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f26e87b4f3e in QEventDispatcherGlib::processEvents (this=0xfed700, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#12 0x00007f26e8788cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007f26e8788ef7 in QEventLoop::exec (this=0x7f26cfb6edb0, flags=...) at kernel/qeventloop.cpp:201
#14 0x00007f26e86a027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#15 0x00007f26e876bcbf in QInotifyFileSystemWatcherEngine::run (this=0xff0c40) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007f26e86a2d05 in QThreadPrivate::start (arg=0xff0c40) at thread/qthread_unix.cpp:331
#17 0x00007f26e065aefc in start_thread (arg=0x7f26cfb6f700) at pthread_create.c:304
#18 0x00007f26eb5cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#19 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f26cd95c700 (LWP 1798)):
#0  0x00007f26eb5c3773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f26dfb4df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f26dfb4e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f26e87b4f3e in QEventDispatcherGlib::processEvents (this=0x1092180, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f26e8788cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f26e8788ef7 in QEventLoop::exec (this=0x7f26cd95bdb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f26e86a027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f26e876bcbf in QInotifyFileSystemWatcherEngine::run (this=0x1091550) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f26e86a2d05 in QThreadPrivate::start (arg=0x1091550) at thread/qthread_unix.cpp:331
#9  0x00007f26e065aefc in start_thread (arg=0x7f26cd95c700) at pthread_create.c:304
#10 0x00007f26eb5cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f26ebcdd7a0 (LWP 1795)):
[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=0x273fff0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f26d0860112 in WindowTaskItem::publishIconGeometry (this=0x27cc5f0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f26d086eb7c in AbstractTaskItem::timerEvent (this=0x27cc5f0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f26e87a0789 in QObject::event (this=0x27cc5f0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f26e815889b in QGraphicsWidget::event (this=0x27cc5f0, event=0x7fffb672cd10) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f26e7b3a424 in notify_helper (e=0x7fffb672cd10, receiver=0x27cc5f0, this=0x8a9120) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x8a9120, receiver=0x27cc5f0, e=0x7fffb672cd10) at kernel/qapplication.cpp:4458
#15 0x00007f26e7b3f291 in QApplication::notify (this=0x8a3090, receiver=0x27cc5f0, e=0x7fffb672cd10) at kernel/qapplication.cpp:4365
#16 0x00007f26e9438126 in KApplication::notify (this=0x8a3090, receiver=0x27cc5f0, event=0x7fffb672cd10) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f26e8789afc in QCoreApplication::notifyInternal (this=0x8a3090, receiver=0x27cc5f0, event=0x7fffb672cd10) at kernel/qcoreapplication.cpp:787
#18 0x00007f26e87b6d62 in sendEvent (event=0x7fffb672cd10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x8abd50) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f26e87b4514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f26dfb4da5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f26dfb4e258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f26dfb4e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f26e87b4ed6 in QEventDispatcherGlib::processEvents (this=0x82bf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007f26e7be207e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f26e8788cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f26e8788ef7 in QEventLoop::exec (this=0x7fffb672cfa0, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007f26e878d789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007f26eb8ce1a3 in kdemain (argc=1, argv=0x7fffb672d388) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007f26eb50f30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffb672d388, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb672d378) at libc-start.c:226
#31 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 272495.

Possible duplicates by query: bug 291530, bug 291511, bug 291510, bug 291487, bug 291447.

Reported using DrKonqi