Bug 288874

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 i686
Distribution: Ubuntu 11.10

-- Information about the crash:
it happened all of a sudden and i don't know how to reproduce it since it was something random. it caused the k bar (i'm on kubuntu 11.10 and it's up-to-date)

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 0xb77f2b20 (LWP 2002))]

Thread 5 (Thread 0xb060db70 (LWP 2003)):
#0  0x03822c5d in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0x02da3b37 in QEventDispatcherGlib::processEvents (this=0x9b48378, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#2  0x02d741dd in QEventLoop::processEvents (this=0xb060d2a0, flags=...) at kernel/qeventloop.cpp:149
#3  0x02d74421 in QEventLoop::exec (this=0xb060d2a0, flags=...) at kernel/qeventloop.cpp:201
#4  0x02c7790b in QThread::exec (this=0x9b59e68) at thread/qthread.cpp:498
#5  0x02d54e2d in QInotifyFileSystemWatcherEngine::run (this=0x9b59e68) at io/qfilesystemwatcher_inotify.cpp:248
#6  0x02c7a7b3 in QThreadPrivate::start (arg=0x9b59e68) at thread/qthread_unix.cpp:331
#7  0x05e70d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x00cf20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 4 (Thread 0xaf4f6b70 (LWP 2005)):
#0  0x00e66416 in __kernel_vsyscall ()
#1  0x05e74a5c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x00cffcfc in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x02335883 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0x0233599f in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0x05e70d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x00cf20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xaebcdb70 (LWP 2006)):
#0  0x061d9d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x02cd17d5 in do_gettime (frac=0xaebcd0a0, sec=0xaebcd098) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x02da44b6 in QTimerInfoList::updateCurrentTime (this=0xafd0117c) at kernel/qeventdispatcher_unix.cpp:339
#4  0x02da4086 in timerSourceCheckHelper (src=0xafd01148) at kernel/qeventdispatcher_glib.cpp:150
#5  timerSourceCheckHelper (src=0xafd01148) at kernel/qeventdispatcher_glib.cpp:144
#6  0x03821f24 in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x038228f0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x03822c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x02da3b37 in QEventDispatcherGlib::processEvents (this=0x9c1e4f0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#10 0x02d741dd in QEventLoop::processEvents (this=0xaebcd2d0, flags=...) at kernel/qeventloop.cpp:149
#11 0x02d74421 in QEventLoop::exec (this=0xaebcd2d0, flags=...) at kernel/qeventloop.cpp:201
#12 0x02c7790b in QThread::exec (this=0x9c1dd48) at thread/qthread.cpp:498
#13 0x02c779fb in QThread::run (this=0x9c1dd48) at thread/qthread.cpp:565
#14 0x02c7a7b3 in QThreadPrivate::start (arg=0x9c1dd48) at thread/qthread_unix.cpp:331
#15 0x05e70d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#16 0x00cf20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xad1d4b70 (LWP 2007)):
#0  0x00cfff37 in pthread_mutex_unlock () from /lib/i386-linux-gnu/libc.so.6
#1  0x03822877 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0x03822c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x02da3b37 in QEventDispatcherGlib::processEvents (this=0x9e34960, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x02d741dd in QEventLoop::processEvents (this=0xad1d42a0, flags=...) at kernel/qeventloop.cpp:149
#5  0x02d74421 in QEventLoop::exec (this=0xad1d42a0, flags=...) at kernel/qeventloop.cpp:201
#6  0x02c7790b in QThread::exec (this=0x9e2ed60) at thread/qthread.cpp:498
#7  0x02d54e2d in QInotifyFileSystemWatcherEngine::run (this=0x9e2ed60) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x02c7a7b3 in QThreadPrivate::start (arg=0x9e2ed60) at thread/qthread_unix.cpp:331
#9  0x05e70d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#10 0x00cf20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb77f2b20 (LWP 2002)):
[KCrash Handler]
#7  isNull (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0xab56488) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x043a4662 in WindowTaskItem::publishIconGeometry (this=0xa078528) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x043b5688 in AbstractTaskItem::timerEvent (this=0xa078528, event=0xbfe243bc) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x02d8d994 in QObject::event (this=0xa078528, e=0xbfe243bc) at kernel/qobject.cpp:1181
#13 0x089e3bd4 in QGraphicsWidget::event (this=0xa078528, event=0xbfe243bc) at graphicsview/qgraphicswidget.cpp:1455
#14 0x08324d54 in notify_helper (e=0xbfe243bc, receiver=0xa078528, this=0x8fd8668) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x8fd8668, receiver=0xa078528, e=0xbfe243bc) at kernel/qapplication.cpp:4458
#16 0x0832a103 in QApplication::notify (this=0xbfe243bc, receiver=0xa078528, e=0xbfe243bc) at kernel/qapplication.cpp:3886
#17 0x010b9681 in KApplication::notify (this=0x8fc73d0, receiver=0xa078528, event=0xbfe243bc) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x02d7519e in QCoreApplication::notifyInternal (this=0x8fc73d0, receiver=0xa078528, event=0xbfe243bc) at kernel/qcoreapplication.cpp:787
#19 0x02da5c10 in sendEvent (event=0xbfe243bc, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x8fdf834) at kernel/qeventdispatcher_unix.cpp:603
#21 0x02da3122 in timerSourceDispatch (source=0x8fdf800) at kernel/qeventdispatcher_glib.cpp:184
#22 0x0382225f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#23 0x03822990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x03822c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x02da3ada in QEventDispatcherGlib::processEvents (this=0x8f82230, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#26 0x083dce3a in QGuiEventDispatcherGlib::processEvents (this=0x8f82230, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x02d741dd in QEventLoop::processEvents (this=0xbfe24634, flags=...) at kernel/qeventloop.cpp:149
#28 0x02d74421 in QEventLoop::exec (this=0xbfe24634, flags=...) at kernel/qeventloop.cpp:201
#29 0x02d7919d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x083228f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#31 0x0031e18b in kdemain (argc=1, argv=0xbfe24834) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x0804850b in main (argc=1, argv=0xbfe24834) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 288866, bug 288818, bug 288811, bug 288759, bug 288636.

Reported using DrKonqi