Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic i686
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
i have selected another windoew with mouse in plasma panel.
It's happpen often

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 0xb7743b20 (LWP 1588))]

Thread 4 (Thread 0xb1632b70 (LWP 1590)):
#0  0x05d27d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x065e77d5 in do_gettime (frac=0xb1632010, sec=0xb1632008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x066ba4b6 in QTimerInfoList::updateCurrentTime (this=0x9511cbc) at kernel/qeventdispatcher_unix.cpp:339
#4  0x066ba80a in QTimerInfoList::timerWait (this=0x9511cbc, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x066b9053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xb163211c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x066b90ed in timerSourcePrepare (source=0x9511c88, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x06b9388c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x06b94637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x06b94c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x066b9b37 in QEventDispatcherGlib::processEvents (this=0x9508f08, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x0668a1dd in QEventLoop::processEvents (this=0xb16322a0, flags=...) at kernel/qeventloop.cpp:149
#12 0x0668a421 in QEventLoop::exec (this=0xb16322a0, flags=...) at kernel/qeventloop.cpp:201
#13 0x0658d90b in QThread::exec (this=0x9505780) at thread/qthread.cpp:498
#14 0x0666ae2d in QInotifyFileSystemWatcherEngine::run (this=0x9505780) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x065907b3 in QThreadPrivate::start (arg=0x9505780) at thread/qthread_unix.cpp:331
#16 0x05c03d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x00cba0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xafd3fb70 (LWP 1591)):
#0  0x05c05dbd in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x00cc7f14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0x06b93f53 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x06b948f0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x06b94c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x066b9b37 in QEventDispatcherGlib::processEvents (this=0x9648500, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x0668a1dd in QEventLoop::processEvents (this=0xafd3f2a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x0668a421 in QEventLoop::exec (this=0xafd3f2a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x0658d90b in QThread::exec (this=0x8f55ce8) at thread/qthread.cpp:498
#9  0x0666ae2d in QInotifyFileSystemWatcherEngine::run (this=0x8f55ce8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x065907b3 in QThreadPrivate::start (arg=0x8f55ce8) at thread/qthread_unix.cpp:331
#11 0x05c03d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x00cba0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xadabdb70 (LWP 1599)):
#0  0x00ec3416 in __kernel_vsyscall ()
#1  0x00cab40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x06ba334b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x06b94896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x06b94f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x05f04cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x06bbb5f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x05c03d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x00cba0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb7743b20 (LWP 1588)):
[KCrash Handler]
#7  isNull (this=0x1) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x1) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x9ae9cf0) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x04f7d662 in WindowTaskItem::publishIconGeometry (this=0x9caba00) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x04f8e688 in AbstractTaskItem::timerEvent (this=0x9caba00, event=0xbf83961c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x066a3994 in QObject::event (this=0x9caba00, e=0xbf83961c) at kernel/qobject.cpp:1181
#13 0x01b13bd4 in QGraphicsWidget::event (this=0x9caba00, event=0xbf83961c) at graphicsview/qgraphicswidget.cpp:1455
#14 0x01454d54 in notify_helper (e=0xbf83961c, receiver=0x9caba00, this=0x8d25898) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x8d25898, receiver=0x9caba00, e=0xbf83961c) at kernel/qapplication.cpp:4458
#16 0x0145a103 in QApplication::notify (this=0xbf83961c, receiver=0x9caba00, e=0xbf83961c) at kernel/qapplication.cpp:3886
#17 0x010ab681 in KApplication::notify (this=0x8d1c1f0, receiver=0x9caba00, event=0xbf83961c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x0668b19e in QCoreApplication::notifyInternal (this=0x8d1c1f0, receiver=0x9caba00, event=0xbf83961c) at kernel/qcoreapplication.cpp:787
#19 0x066bbc10 in sendEvent (event=0xbf83961c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x8d29504) at kernel/qeventdispatcher_unix.cpp:603
#21 0x066b9155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x8d2a300) at kernel/qeventdispatcher_glib.cpp:231
#23 0x06b9425f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x06b94990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x06b94c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x066b9ada in QEventDispatcherGlib::processEvents (this=0x8cd6218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0x0150ce3a in QGuiEventDispatcherGlib::processEvents (this=0x8cd6218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x0668a1dd in QEventLoop::processEvents (this=0xbf839894, flags=...) at kernel/qeventloop.cpp:149
#29 0x0668a421 in QEventLoop::exec (this=0xbf839894, flags=...) at kernel/qeventloop.cpp:201
#30 0x0668f19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x014528f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0x0070918b in kdemain (argc=1, argv=0xbf839a94) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbf839a94) at plasma-desktop_dummy.cpp:3

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

Possible duplicates by query: bug 291419, bug 291409, bug 291398, bug 291392, bug 291377.

Reported using DrKonqi