Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:
simply clicked activites

- Unusual behavior I noticed:
amsn icon was put aside in the left top corner of the desktop, in a single little window.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Shell del desktop di Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ffe73a4c7c0 (LWP 1493))]

Thread 3 (Thread 0x7ffe56030700 (LWP 1494)):
#0  0x00007ffe68629d7c in __pthread_mutex_unlock_usercnt (mutex=0xf24788) at pthread_mutex_unlock.c:37
#1  __pthread_mutex_unlock (mutex=0xf24788) at pthread_mutex_unlock.c:290
#2  0x00007ffe67d221b3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffe67d22639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffe7054e446 in QEventDispatcherGlib::processEvents (this=0xf25570, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007ffe70522882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffe70522abc in QEventLoop::exec (this=0x7ffe5602fcd0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007ffe70439924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007ffe70504c2f in QInotifyFileSystemWatcherEngine::run (this=0xeb8090) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007ffe7043c175 in QThreadPrivate::start (arg=0xeb8090) at thread/qthread_unix.cpp:320
#10 0x00007ffe65da7853 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007ffe68625d8c in start_thread (arg=0x7ffe56030700) at pthread_create.c:304
#12 0x00007ffe7334d04d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7ffe481d0700 (LWP 1497)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007ffe481cf9e0 in ?? ()
#2  0x00007fff5e5ff7b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x7ffe73a4c7c0 (LWP 1493)):
[KCrash Handler]
#6  QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively (this=<value optimized out>) at graphicsview/qgraphicsitem.cpp:5372
#7  0x00007ffe6feb4f99 in QGraphicsItem::update (this=0x3798060, rect=...) at graphicsview/qgraphicsitem.cpp:5679
#8  0x00007ffe3f3704ac in ?? () from /usr/lib/pymodules/python2.7/PyQt4/QtGui.so
#9  0x00007ffe40201630 in call_function (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:4013
#10 PyEval_EvalFrameEx (f=<value optimized out>, throwflag=<value optimized out>) at ../Python/ceval.c:2666
#11 0x00007ffe4020327d in PyEval_EvalCodeEx (co=0x3d188b0, globals=<value optimized out>, locals=<value optimized out>, args=<value optimized out>, argcount=1, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:3253
#12 0x00007ffe40182192 in function_call (func=0x3fc7140, arg=0x3d14ed0, kw=0x0) at ../Objects/funcobject.c:526
#13 0x00007ffe40155a53 in PyObject_Call (func=0x3fc7140, arg=<value optimized out>, kw=<value optimized out>) at ../Objects/abstract.c:2529
#14 0x00007ffe401688ff in instancemethod_call (func=0x3fc7140, arg=0x3d14ed0, kw=0x0) at ../Objects/classobject.c:2578
#15 0x00007ffe40155a53 in PyObject_Call (func=0x38545a0, arg=<value optimized out>, kw=<value optimized out>) at ../Objects/abstract.c:2529
#16 0x00007ffe401fb627 in PyEval_CallObjectWithKeywords (func=0x38545a0, arg=0x379a050, kw=<value optimized out>) at ../Python/ceval.c:3882
#17 0x00007ffe3f8afde8 in sip_api_invoke_slot () from /usr/lib/pymodules/python2.7/sip.so
#18 0x00007ffe3fc30766 in ?? () from /usr/lib/pymodules/python2.7/PyQt4/QtCore.so
#19 0x00007ffe3fc30878 in ?? () from /usr/lib/pymodules/python2.7/PyQt4/QtCore.so
#20 0x00007ffe3fc30932 in ?? () from /usr/lib/pymodules/python2.7/PyQt4/QtCore.so
#21 0x00007ffe705385f8 in QMetaObject::activate (sender=0x375f790, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3287
#22 0x00007ffe3fb7ac37 in ?? () from /usr/lib/pymodules/python2.7/PyQt4/QtCore.so
#23 0x00007ffe705371c9 in QObject::event (this=0x375f790, e=<value optimized out>) at kernel/qobject.cpp:1190
#24 0x00007ffe3fb7abd5 in ?? () from /usr/lib/pymodules/python2.7/PyQt4/QtCore.so
#25 0x00007ffe6f8e49e4 in QApplicationPrivate::notify_helper (this=0x9b87f0, receiver=0x375f790, e=0x7fff5e5125d0) at kernel/qapplication.cpp:4462
#26 0x00007ffe6f8e93aa in QApplication::notify (this=<value optimized out>, receiver=0x375f790, e=0x7fff5e5125d0) at kernel/qapplication.cpp:4341
#27 0x00007ffe711db866 in KApplication::notify (this=0x9ab220, receiver=0x375f790, event=0x7fff5e5125d0) at ../../kdeui/kernel/kapplication.cpp:311
#28 0x00007ffe7052349c in QCoreApplication::notifyInternal (this=0x9ab220, receiver=0x375f790, event=0x7fff5e5125d0) at kernel/qcoreapplication.cpp:731
#29 0x00007ffe70550f12 in sendEvent (this=0x9bf610) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#30 QTimerInfoList::activateTimers (this=0x9bf610) at kernel/qeventdispatcher_unix.cpp:604
#31 0x00007ffe7054dd18 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#32 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#33 0x00007ffe67d21bcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007ffe67d223a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007ffe67d22639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007ffe7054e3ef in QEventDispatcherGlib::processEvents (this=0x8fc340, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#37 0x00007ffe6f98bdfe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007ffe70522882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007ffe70522abc in QEventLoop::exec (this=0x7fff5e512840, flags=...) at kernel/qeventloop.cpp:201
#40 0x00007ffe70526ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#41 0x00007ffe73639897 in kdemain (argc=1, argv=0x7fff5e512c08) at ../../../../plasma/desktop/shell/main.cpp:118
#42 0x00007ffe73285eff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fff5e512c08, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff5e512bf8) at libc-start.c:226
#43 0x0000000000400669 in _start ()

This bug may be a duplicate of or related to bug 227673.

Possible duplicates by query: bug 272283, bug 272104, bug 270913, bug 269274, bug 268388.

Reported using DrKonqi