Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.6-20091119-01 i686
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
Switching workspaces (I think I was copying text from a konsole window in another workspace to an email message (Icedove)), everything froze, then came back eventually and the Crash Reporting Assistant popped up.  The kernel may look custom, but it's currently the Debian config from their 2.6.31-2 linux-image: I built it again myself so I could install the Nvidia binary X drivers (which I am using and I thought might be useful to know).

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb585e700 (LWP 4288))]

Thread 2 (Thread 0xa7d10b70 (LWP 4291)):
#0  0xb7851424 in __kernel_vsyscall ()
#1  0xb5f840a5 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0xb61496fd in __pthread_cond_wait (cond=0x9de7f20, mutex=0x9de7f08) at forward.c:139
#3  0xb76545c2 in QWaitConditionPrivate::wait (this=0x9de83b0, mutex=0x9de83ac, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x9de83b0, mutex=0x9de83ac, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0xb5e97a9a in QHostInfoAgent::run (this=0x9de83a0) at kernel/qhostinfo.cpp:260
#6  0xb76535e2 in QThreadPrivate::start (arg=0x9de83a0) at thread/qthread_unix.cpp:188
#7  0xb5f80585 in start_thread (arg=0xa7d10b70) at pthread_create.c:300
#8  0xb613c18e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb585e700 (LWP 4288)):
[KCrash Handler]
#6  Tasks::itemTopMargin (this=0xa6e3998) at ../../../../plasma/applets/tasks/tasks.h:92
#7  AbstractTaskItem::basicPreferredSize (this=0xa6e3998) at ../../../../plasma/applets/tasks/abstracttaskitem.cpp:100
#8  0xa7e5c691 in TaskItemLayout::preferredColumns (this=0x9df4818) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:206
#9  0xa7e5d07d in TaskItemLayout::gridLayoutSize (this=0x9df4818) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:222
#10 0xa7e5d13b in TaskItemLayout::layoutItems (this=0x9df4818) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:245
#11 0xa7e5dcf2 in TaskItemLayout::insert (this=0x9df4818, index=5, item=0xa6a8ac8) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:125
#12 0xa7e5deef in TaskItemLayout::addTaskItem (this=0x9df4818, item=0xa6a8ac8) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:82
#13 0xa7e6a7ed in TaskGroupItem::itemAdded (this=0x9df5e18, groupableItem=0xa42c580) at ../../../../plasma/applets/tasks/taskgroupitem.cpp:477
#14 0xa7e6ae72 in TaskGroupItem::qt_metacall (this=0x9df5e18, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbfe42cac) at ./taskgroupitem.moc:113
#15 0xb7759303 in QMetaObject::activate (sender=0x9df49c0, from_signal_index=21, to_signal_index=21, argv=0xbfe42cac) at kernel/qobject.cpp:3112
#16 0xb7759f42 in QMetaObject::activate (sender=0x9df49c0, m=0xa7e32154, local_signal_index=0, argv=0xbfe42cac) at kernel/qobject.cpp:3186
#17 0xa7e24823 in TaskManager::TaskGroup::itemAdded (this=0x9df49c0, _t1=0xa42c580) at ./taskgroup.moc:145
#18 0xa7e254ab in TaskManager::TaskGroup::add (this=0x9df49c0, item=0xa42c580) at ../../../libs/taskmanager/taskgroup.cpp:138
#19 0xa7e0bd1a in TaskManager::GroupManagerPrivate::addTask (this=0x9df3f48, task=...) at ../../../libs/taskmanager/groupmanager.cpp:290
#20 0xa7e0cb9a in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x9df3f48) at ../../../libs/taskmanager/groupmanager.cpp:155
#21 0xa7e0e11e in TaskManager::GroupManager::qt_metacall (this=0x9e169b8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbfe42ea8) at ./groupmanager.moc:108
#22 0xb7759303 in QMetaObject::activate (sender=0x9df3f88, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#23 0xb7759f42 in QMetaObject::activate (sender=0x9df3f88, m=0xb7835d84, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3186
#24 0xb7794b37 in QTimer::timeout (this=0x9df3f88) at .moc/release-shared/moc_qtimer.cpp:128
#25 0xb775f65e in QTimer::timerEvent (this=0x9df3f88, e=0xbfe4332c) at kernel/qtimer.cpp:261
#26 0xb775439f in QObject::event (this=0x9df3f88, e=0xbfe4332c) at kernel/qobject.cpp:1074
#27 0xb63eaa94 in QApplicationPrivate::notify_helper (this=0x9a3d728, receiver=0x9df3f88, e=0xbfe4332c) at kernel/qapplication.cpp:4065
#28 0xb63f2bee in QApplication::notify (this=0x9a16840, receiver=0x9df3f88, e=0xbfe4332c) at kernel/qapplication.cpp:3605
#29 0xb6e340fd in KApplication::notify (this=0x9a16840, receiver=0x9df3f88, event=0xbfe4332c) at ../../kdeui/kernel/kapplication.cpp:302
#30 0xb77441eb in QCoreApplication::notifyInternal (this=0x9a16840, receiver=0x9df3f88, event=0xbfe4332c) at kernel/qcoreapplication.cpp:610
#31 0xb7772e21 in QCoreApplication::sendEvent (this=0x9a40334) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#32 QTimerInfoList::activateTimers (this=0x9a40334) at kernel/qeventdispatcher_unix.cpp:580
#33 0xb776f317 in timerSourceDispatch (source=0x9a3fea8) at kernel/qeventdispatcher_glib.cpp:184
#34 idleTimerSourceDispatch (source=0x9a3fea8) at kernel/qeventdispatcher_glib.cpp:231
#35 0xb5fcde98 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#36 0xb5fd1623 in ?? () from /lib/libglib-2.0.so.0
#37 0xb5fd17a8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#38 0xb776f041 in QEventDispatcherGlib::processEvents (this=0x9a3d518, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#39 0xb648a305 in QGuiEventDispatcherGlib::processEvents (this=0x9a3d518, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#40 0xb774283a in QEventLoop::processEvents (this=0xbfe43550, flags=...) at kernel/qeventloop.cpp:149
#41 0xb7742c82 in QEventLoop::exec (this=0xbfe43550, flags=...) at kernel/qeventloop.cpp:201
#42 0xb77450d9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#43 0xb63ea917 in QApplication::exec () at kernel/qapplication.cpp:3525
#44 0xb336aec0 in kdemain (argc=1, argv=0x99b2320) at ../../../../plasma/shells/desktop/main.cpp:50
#45 0x0804e291 in launch (argc=1, _name=0x99cbc14 "/usr/bin/plasma-desktop", args=0x99cbc2c "", cwd=0x0, envc=0, envs=0x99cbc30 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805109f "0") at ../../kinit/kinit.cpp:677
#46 0x0804ea15 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#47 0x0804ef3f in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#48 0x0804f6c9 in main (argc=2, argv=0xbfe43dd4, envp=0xbfe43de0) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 212400

Reported using DrKonqi