Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-16-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
Switched virtual desktop.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f76d97157a0 (LWP 1646))]

Thread 4 (Thread 0x7f76bcc8b700 (LWP 1647)):
#0  0x00007f76d8feb473 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f76cd32df68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f76cd32e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f76d61d5f3e in QEventDispatcherGlib::processEvents (this=0x1681170, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f76d61a9cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f76d61a9ef7 in QEventLoop::exec (this=0x7f76bcc8adb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f76d60c127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f76d618ccbf in QInotifyFileSystemWatcherEngine::run (this=0x167f250) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f76d60c3d05 in QThreadPrivate::start (arg=0x167f250) at thread/qthread_unix.cpp:331
#9  0x00007f76cde3aefc in start_thread (arg=0x7f76bcc8b700) at pthread_create.c:304
#10 0x00007f76d8ff759d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f76b1368700 (LWP 1648)):
#0  0x00007f76cde3d034 in __pthread_mutex_lock (mutex=0x18ea9e8) at pthread_mutex_lock.c:61
#1  0x00007f76cd32d023 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f76cd32ddfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f76cd32e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f76d61d5f3e in QEventDispatcherGlib::processEvents (this=0x15ced30, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f76d61a9cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f76d61a9ef7 in QEventLoop::exec (this=0x7f76b1367db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f76d60c127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f76d618ccbf in QInotifyFileSystemWatcherEngine::run (this=0x120f280) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f76d60c3d05 in QThreadPrivate::start (arg=0x120f280) at thread/qthread_unix.cpp:331
#10 0x00007f76cde3aefc in start_thread (arg=0x7f76b1368700) at pthread_create.c:304
#11 0x00007f76d8ff759d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f76a9c22700 (LWP 1657)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f76d31d9fe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f76d31da019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f76cde3aefc in start_thread (arg=0x7f76a9c22700) at pthread_create.c:304
#4  0x00007f76d8ff759d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f76d97157a0 (LWP 1646)):
[KCrash Handler]
#6  KWindowInfo::valid (this=0x10, withdrawn_is_valid=true) at ../../kdeui/windowmanagement/kwindowinfo_x11.cpp:133
#7  0x00007f76bfc094d6 in TaskManager::Task::isOnCurrentDesktop (this=0x1cffb20) at ../../../libs/taskmanager/task.cpp:211
#8  0x00007f76a8f61c64 in TaskSource::updateDesktop (this=0x1d0f880, desktop=<optimized out>) at ../../../../../plasma/generic/dataengines/tasks/tasksource.cpp:161
#9  0x00007f76a8f61fc3 in TaskSource::qt_metacall (this=0x1d0f880, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7ffff98dca00) at ./tasksource.moc:82
#10 0x00007f76d61bdeba in QMetaObject::activate (sender=0x154c970, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffff98dca00) at kernel/qobject.cpp:3278
#11 0x00007f76bfc156f1 in TaskManager::TaskManager::desktopChanged (this=<optimized out>, _t1=2) at ./taskmanager.moc:200
#12 0x00007f76bfc17237 in TaskManager::TaskManager::qt_metacall (this=0x154c970, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0x7ffff98dcbd0) at ./taskmanager.moc:127
#13 0x00007f76d61bdeba in QMetaObject::activate (sender=0xd358f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffff98dcbd0) at kernel/qobject.cpp:3278
#14 0x00007f76d6f9076e in KWindowSystem::currentDesktopChanged (this=<optimized out>, _t1=2) at ./kwindowsystem.moc:122
#15 0x00007f76d6f92c63 in KWindowSystemPrivate::x11Event (this=0xd6e070, ev=0x7ffff98dcce0) at ../../kdeui/windowmanagement/kwindowsystem_x11.cpp:175
#16 0x00007f76d6e823e6 in publicX11Event (e=0x7ffff98dcce0, this=<optimized out>) at ../../kdeui/kernel/ksystemeventfilter.cpp:43
#17 KSystemEventFilterPrivate::filterEvent (this=0xd93b60, message=0x7ffff98dcce0) at ../../kdeui/kernel/ksystemeventfilter.cpp:102
#18 0x00007f76d5602418 in x11EventSourceDispatch (s=0xc71a30, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:143
#19 0x00007f76cd32da5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f76cd32e258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f76cd32e429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f76d61d5ed6 in QEventDispatcherGlib::processEvents (this=0xbf1f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#23 0x00007f76d560210e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f76d61a9cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f76d61a9ef7 in QEventLoop::exec (this=0x7ffff98dd0b0, flags=...) at kernel/qeventloop.cpp:201
#26 0x00007f76d61ae789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#27 0x00007f76d92f61a3 in kdemain (argc=1, argv=0x7ffff98dd498) at ../../../../plasma/desktop/shell/main.cpp:120
#28 0x00007f76d8f3530d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7ffff98dd498, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff98dd488) at libc-start.c:226
#29 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 286353.

Possible duplicates by query: bug 295116, bug 291700, bug 290829, bug 290024, bug 289611.

Reported using DrKonqi