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 looking at web pages on Chromium. There was nothing in particular I noticed that caused it.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f60c09437a0 (LWP 1856))]

Thread 4 (Thread 0x7f609e537700 (LWP 1874)):
#0  0x00007f60b47ae06b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f60b47aedfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60b47af429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60bd415f3e in QEventDispatcherGlib::processEvents (this=0x2f69aa0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f60bd3e9cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f60bd3e9ef7 in QEventLoop::exec (this=0x7f609e536db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f60bd30127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f60bd3cccbf in QInotifyFileSystemWatcherEngine::run (this=0x2f68190) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f60bd303d05 in QThreadPrivate::start (arg=0x2f68190) at thread/qthread_unix.cpp:331
#9  0x00007f60b52bbefc in start_thread (arg=0x7f609e537700) at pthread_create.c:304
#10 0x00007f60c023089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f609cbc3700 (LWP 1875)):
#0  0x00007f60c0224773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f60b47aef68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60b47af429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f60bd415f3e in QEventDispatcherGlib::processEvents (this=0x2820ad0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f60bd3e9cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f60bd3e9ef7 in QEventLoop::exec (this=0x7f609cbc2db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f60bd30127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f60bd3cccbf in QInotifyFileSystemWatcherEngine::run (this=0x311d630) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f60bd303d05 in QThreadPrivate::start (arg=0x311d630) at thread/qthread_unix.cpp:331
#9  0x00007f60b52bbefc in start_thread (arg=0x7f609cbc3700) at pthread_create.c:304
#10 0x00007f60c023089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6091db2700 (LWP 1889)):
#0  0x00007f60c0224773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f60b47aef68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f60b47af792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6092890516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f60b47d42b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f60b52bbefc in start_thread (arg=0x7f6091db2700) at pthread_create.c:304
#6  0x00007f60c023089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f60c09437a0 (LWP 1856)):
[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=0x3df8520) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f60a6bea112 in WindowTaskItem::publishIconGeometry (this=0x3ee4780) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f60a6bf8b7c in AbstractTaskItem::timerEvent (this=0x3ee4780, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f60bd401789 in QObject::event (this=0x3ee4780, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f60bcdb989b in QGraphicsWidget::event (this=0x3ee4780, event=0x7fff9d2334e0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f60bc79b424 in notify_helper (e=0x7fff9d2334e0, receiver=0x3ee4780, this=0x2531940) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x2531940, receiver=0x3ee4780, e=0x7fff9d2334e0) at kernel/qapplication.cpp:4458
#15 0x00007f60bc7a0291 in QApplication::notify (this=0x2526540, receiver=0x3ee4780, e=0x7fff9d2334e0) at kernel/qapplication.cpp:4365
#16 0x00007f60be099126 in KApplication::notify (this=0x2526540, receiver=0x3ee4780, event=0x7fff9d2334e0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f60bd3eaafc in QCoreApplication::notifyInternal (this=0x2526540, receiver=0x3ee4780, event=0x7fff9d2334e0) at kernel/qcoreapplication.cpp:787
#18 0x00007f60bd417d62 in sendEvent (event=0x7fff9d2334e0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x2534dd0) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f60bd415514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f60b47aea5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f60b47af258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f60b47af429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f60bd415ed6 in QEventDispatcherGlib::processEvents (this=0x24c6f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007f60bc84307e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f60bd3e9cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f60bd3e9ef7 in QEventLoop::exec (this=0x7fff9d233770, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007f60bd3ee789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007f60c052f1a3 in kdemain (argc=1, argv=0x7fff9d233b58) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007f60c017030d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff9d233b58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9d233b48) at libc-start.c:226
#31 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291911, bug 291905, bug 291893, bug 291889, bug 291884.

Reported using DrKonqi