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:

Just doing regular web development tasks:
 - coding in Konsole
 - viewing web pages in Firefox and Opera
 - switching between browsers and Konsole a lot.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f17748247a0 (LWP 2214))]

Thread 3 (Thread 0x7f1751f4b700 (LWP 2216)):
#0  0x00007fffe3ce592c in clock_gettime ()
#1  0x00007f176893c07b in __GI_clock_gettime (clock_id=1, tp=0x7f1751f4ab20) at ../sysdeps/unix/clock_gettime.c:100
#2  0x00007f177122c074 in do_gettime (frac=0x7f1751f4ab38, sec=0x7f1751f4ab30) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007f17712ee6ed in QTimerInfoList::updateCurrentTime (this=0x118a810) at kernel/qeventdispatcher_unix.cpp:339
#5  0x00007f17712eea33 in QTimerInfoList::timerWait (this=0x118a810, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#6  0x00007f17712ed44c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7f1751f4ac1c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007f17712ed4f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007f1768685ff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f1768686dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f1768687429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f17712edf3e in QEventDispatcherGlib::processEvents (this=0x1185fd0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#12 0x00007f17712c1cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007f17712c1ef7 in QEventLoop::exec (this=0x7f1751f4adb0, flags=...) at kernel/qeventloop.cpp:201
#14 0x00007f17711d927f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#15 0x00007f17712a4cbf in QInotifyFileSystemWatcherEngine::run (this=0x1188660) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007f17711dbd05 in QThreadPrivate::start (arg=0x1188660) at thread/qthread_unix.cpp:331
#17 0x00007f1769193efc in start_thread (arg=0x7f1751f4b700) at pthread_create.c:304
#18 0x00007f177410889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#19 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f174f597700 (LWP 2217)):
#0  0x00007fffe3ce592c in clock_gettime ()
#1  0x00007f176893c07b in __GI_clock_gettime (clock_id=1, tp=0x7f174f596b20) at ../sysdeps/unix/clock_gettime.c:100
#2  0x00007f177122c074 in do_gettime (frac=0x7f174f596b38, sec=0x7f174f596b30) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007f17712ee6ed in QTimerInfoList::updateCurrentTime (this=0x131a760) at kernel/qeventdispatcher_unix.cpp:339
#5  0x00007f17712eea33 in QTimerInfoList::timerWait (this=0x131a760, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#6  0x00007f17712ed44c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7f174f596c1c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007f17712ed4f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007f1768685ff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f1768686dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f1768687429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f17712edf3e in QEventDispatcherGlib::processEvents (this=0x1341130, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#12 0x00007f17712c1cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007f17712c1ef7 in QEventLoop::exec (this=0x7f174f596db0, flags=...) at kernel/qeventloop.cpp:201
#14 0x00007f17711d927f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#15 0x00007f17712a4cbf in QInotifyFileSystemWatcherEngine::run (this=0x13436d0) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007f17711dbd05 in QThreadPrivate::start (arg=0x13436d0) at thread/qthread_unix.cpp:331
#17 0x00007f1769193efc in start_thread (arg=0x7f174f597700) at pthread_create.c:304
#18 0x00007f177410889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#19 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f17748247a0 (LWP 2214)):
[KCrash Handler]
#6  operator== (value=0, this=0xe) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x1b37890) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x1b37890) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f175af26112 in WindowTaskItem::publishIconGeometry (this=0x8c6850) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f175af34b7c in AbstractTaskItem::timerEvent (this=0x8c6850, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f17712d9789 in QObject::event (this=0x8c6850, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007f1770c9189b in QGraphicsWidget::event (this=0x8c6850, event=0x7fffe3c9a660) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f1770673424 in notify_helper (e=0x7fffe3c9a660, receiver=0x8c6850, this=0x69d790) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x69d790, receiver=0x8c6850, e=0x7fffe3c9a660) at kernel/qapplication.cpp:4458
#16 0x00007f1770678291 in QApplication::notify (this=0x68d3e0, receiver=0x8c6850, e=0x7fffe3c9a660) at kernel/qapplication.cpp:4365
#17 0x00007f1771f71126 in KApplication::notify (this=0x68d3e0, receiver=0x8c6850, event=0x7fffe3c9a660) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f17712c2afc in QCoreApplication::notifyInternal (this=0x68d3e0, receiver=0x8c6850, event=0x7fffe3c9a660) at kernel/qcoreapplication.cpp:787
#19 0x00007f17712efd62 in sendEvent (event=0x7fffe3c9a660, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x6a1290) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007f17712ed538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007f1768686a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f1768687258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f1768687429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f17712eded6 in QEventDispatcherGlib::processEvents (this=0x621f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f177071b07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f17712c1cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f17712c1ef7 in QEventLoop::exec (this=0x7fffe3c9a8f0, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f17712c6789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007f17744071a3 in kdemain (argc=1, argv=0x7fffe3c9acd8) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007f177404830d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffe3c9acd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe3c9acc8) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289669, bug 289653, bug 289651, bug 289640, bug 289559.

Reported using DrKonqi