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:
1) Right clic on Google Chrome button on task panel
2) Left clic on Close
3) Google Chrome quits, then Plasma crashes
4) Plasma automatically restarts.

- Unusual behavior I noticed:
Plasma crashes quite often compared with Gnome 2.6, that I used before.
Plasma crashes when : closing windows, closing session.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f5c5d9ae7a0 (LWP 4536))]

Thread 4 (Thread 0x7f5c34a63700 (LWP 4558)):
#0  0x00007f5c523281fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x239c2d8) at pthread_mutex_unlock.c:290
#2  0x00007f5c51818013 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c51818429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5c5a47ef3e in QEventDispatcherGlib::processEvents (this=0x239b860, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f5c5a452cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f5c5a452ef7 in QEventLoop::exec (this=0x7f5c34a62db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f5c5a36a27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f5c5a435cbf in QInotifyFileSystemWatcherEngine::run (this=0x239a120) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f5c5a36cd05 in QThreadPrivate::start (arg=0x239a120) at thread/qthread_unix.cpp:331
#10 0x00007f5c52324efc in start_thread (arg=0x7f5c34a63700) at pthread_create.c:304
#11 0x00007f5c5d29989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f5c2e0a7700 (LWP 4559)):
#0  0x00007f5c5d28d773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f5c51817f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c51818429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c5a47ef3e in QEventDispatcherGlib::processEvents (this=0x2409fe0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f5c5a452cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5c5a452ef7 in QEventLoop::exec (this=0x7f5c2e0a6db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f5c5a36a27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f5c5a435cbf in QInotifyFileSystemWatcherEngine::run (this=0x24095f0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f5c5a36cd05 in QThreadPrivate::start (arg=0x24095f0) at thread/qthread_unix.cpp:331
#9  0x00007f5c52324efc in start_thread (arg=0x7f5c2e0a7700) at pthread_create.c:304
#10 0x00007f5c5d29989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f5c28f3a700 (LWP 4565)):
#0  0x00007f5c5d28d773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f5c51817f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c51818792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c29a18516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f5c5183d2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5c52324efc in start_thread (arg=0x7f5c28f3a700) at pthread_create.c:304
#6  0x00007f5c5d29989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5c5d9ae7a0 (LWP 4536)):
[KCrash Handler]
#6  isNull (this=0x6) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x6) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x2c54220) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f5c3d405112 in WindowTaskItem::publishIconGeometry (this=0x3d60860) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f5c3d40d7cc in AbstractTaskItem::setGeometry (this=0x3d60860, geometry=...) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:1018
#11 0x00007f5c59e2a911 in QGraphicsWidgetPrivate::setGeometryFromSetPos (this=0x2facd80) at graphicsview/qgraphicswidget_p.cpp:906
#12 0x00007f5c59e24265 in QGraphicsWidget::itemChange (this=0x3d60860, change=QGraphicsItem::ItemPositionHasChanged, value=...) at graphicsview/qgraphicswidget.cpp:1150
#13 0x00007f5c59dc17be in QGraphicsItem::setPos (this=0x3d60870, pos=<optimized out>) at graphicsview/qgraphicsitem.cpp:3740
#14 0x00007f5c3d410024 in AbstractTaskItem::setAnimationPos (this=0x3d60860, pos=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:993
#15 0x00007f5c3d41167c in AbstractTaskItem::qt_metacall (this=0x3d60860, _c=QMetaObject::WriteProperty, _id=<optimized out>, _a=0x7fff62734d78) at ./abstracttaskitem.moc:126
#16 0x00007f5c3d4059c0 in WindowTaskItem::qt_metacall (this=0x3d60860, _c=QMetaObject::WriteProperty, _id=<optimized out>, _a=0x7fff62734d78) at ./windowtaskitem.moc:72
#17 0x00007f5c5a356aa1 in QPropertyAnimationPrivate::updateProperty (this=0x2cad9d0, newValue=...) at animation/qpropertyanimation.cpp:139
#18 0x00007f5c5a354338 in QVariantAnimationPrivate::setCurrentValueForProgress (this=0x2cad9d0, progress=<optimized out>) at animation/qvariantanimation.cpp:293
#19 0x00007f5c5a3545ae in QVariantAnimationPrivate::recalculateCurrentInterval (this=0x2cad9d0, force=<optimized out>) at animation/qvariantanimation.cpp:278
#20 0x00007f5c5a3528cc in QAbstractAnimation::setCurrentTime (this=0x2e4ffc0, msecs=<optimized out>) at animation/qabstractanimation.cpp:751
#21 0x00007f5c5a352aef in updateAnimationsTime (this=0x1bd04a0) at animation/qabstractanimation.cpp:234
#22 QUnifiedTimer::updateAnimationsTime (this=0x1bd04a0) at animation/qabstractanimation.cpp:206
#23 0x00007f5c5a35306f in QUnifiedTimer::timerEvent (this=0x1bd04a0, event=0x7fff62735410) at animation/qabstractanimation.cpp:291
#24 0x00007f5c5a46a789 in QObject::event (this=0x1bd04a0, e=<optimized out>) at kernel/qobject.cpp:1181
#25 0x00007f5c59804424 in notify_helper (e=0x7fff62735410, receiver=0x1bd04a0, this=0xeefda0) at kernel/qapplication.cpp:4486
#26 QApplicationPrivate::notify_helper (this=0xeefda0, receiver=0x1bd04a0, e=0x7fff62735410) at kernel/qapplication.cpp:4458
#27 0x00007f5c59809291 in QApplication::notify (this=0xedcb40, receiver=0x1bd04a0, e=0x7fff62735410) at kernel/qapplication.cpp:4365
#28 0x00007f5c5b102126 in KApplication::notify (this=0xedcb40, receiver=0x1bd04a0, event=0x7fff62735410) at ../../kdeui/kernel/kapplication.cpp:311
#29 0x00007f5c5a453afc in QCoreApplication::notifyInternal (this=0xedcb40, receiver=0x1bd04a0, event=0x7fff62735410) at kernel/qcoreapplication.cpp:787
#30 0x00007f5c5a480d62 in sendEvent (event=0x7fff62735410, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#31 QTimerInfoList::activateTimers (this=0xeed9d0) at kernel/qeventdispatcher_unix.cpp:603
#32 0x00007f5c5a47e514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#33 0x00007f5c51817a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f5c51818258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f5c51818429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f5c5a47eed6 in QEventDispatcherGlib::processEvents (this=0xe74f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#37 0x00007f5c598ac07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007f5c5a452cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007f5c5a452ef7 in QEventLoop::exec (this=0x7fff627356a0, flags=...) at kernel/qeventloop.cpp:201
#40 0x00007f5c5a457789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#41 0x00007f5c5d5981a3 in kdemain (argc=1, argv=0x7fff62735a88) at ../../../../plasma/desktop/shell/main.cpp:120
#42 0x00007f5c5d1d930d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff62735a88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff62735a78) at libc-start.c:226
#43 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291487, bug 291447, bug 291439, bug 291431, bug 291419.

Reported using DrKonqi