Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Clicking on image attacted to an email prompted to run gwenview.

Clicked twice (due to slow/loaded machine).

plasma-desktop crashed, around the same time that two gwenview windows appeared.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 0 (LWP 17880)]

Thread 2 (Thread 0x7f4adba37950 (LWP 17882)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f4af5e60939 in QWaitCondition::wait (this=0x23dd100, mutex=0x23dd0f8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f4af94254cc in QHostInfoAgent::run (this=0x23dd0e0) at kernel/qhostinfo.cpp:260
#3  0x00007f4af5e5f952 in QThreadPrivate::start (arg=0x23dd0e0) at thread/qthread_unix.cpp:189
#4  0x00007f4af25603ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f4af53bcfcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4afab27760 (LWP 17880)):
[KCrash Handler]
#5  AbstractTaskItem::basicPreferredSize (this=0x37cd590) at /build/buildd/kdebase-workspace-4.2.96/plasma/applets/tasks/tasks.h:92
#6  0x00007f4ade082322 in TaskItemLayout::maximumRows (this=0x22ad800) at /build/buildd/kdebase-workspace-4.2.96/plasma/applets/tasks/taskitemlayout.cpp:185
#7  0x00007f4ade08a9f7 in TaskGroupItem::optimumCapacity (this=0x22aceb0) at /build/buildd/kdebase-workspace-4.2.96/plasma/applets/tasks/taskgroupitem.cpp:1224
#8  0x00007f4ade07dc50 in Tasks::adjustGroupingStrategy (this=0x21ed8b0) at /build/buildd/kdebase-workspace-4.2.96/plasma/applets/tasks/tasks.cpp:241
#9  0x00007f4ade07de68 in Tasks::constraintsEvent (this=0x21ed8b0, constraints={i = -180275928}) at /build/buildd/kdebase-workspace-4.2.96/plasma/applets/tasks/tasks.cpp:165
#10 0x00007f4afa126839 in Plasma::Applet::flushPendingConstraintsEvents (this=0x21ed8b0) at /build/buildd/kde4libs-4.2.96/plasma/applet.cpp:1160
#11 0x00007f4afa126fb5 in Plasma::Applet::timerEvent (this=0x21ed8b0, event=<value optimized out>) at /build/buildd/kde4libs-4.2.96/plasma/applet.cpp:2104
#12 0x00007f4af5f584d3 in QObject::event (this=0x21ed8b0, e=0x7f4af5413528) at kernel/qobject.cpp:1082
#13 0x00007f4af6ca274b in QGraphicsWidget::event (this=0x21ed8b0, event=0x7fff02b5e850) at graphicsview/qgraphicswidget.cpp:1317
#14 0x00007f4af668d78d in QApplicationPrivate::notify_helper (this=0x1b34e70, receiver=0x21ed8b0, e=0x7fff02b5e850) at kernel/qapplication.cpp:4084
#15 0x00007f4af669597a in QApplication::notify (this=0x1b236d0, receiver=0x21ed8b0, e=0x7fff02b5e850) at kernel/qapplication.cpp:4049
#16 0x00007f4af8d5d63b in KApplication::notify (this=0x1b236d0, receiver=0x21ed8b0, event=0x7fff02b5e850) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#17 0x00007f4af5f4875c in QCoreApplication::notifyInternal (this=0x1b236d0, receiver=0x21ed8b0, event=0x7fff02b5e850) at kernel/qcoreapplication.cpp:602
#18 0x00007f4af5f757f6 in QTimerInfoList::activateTimers (this=0x1b38520) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#19 0x00007f4af5f71f0d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:164
#20 0x00007f4af093020a in IA__g_main_context_dispatch (context=0x1b37520) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#21 0x00007f4af09338e0 in g_main_context_iterate (context=0x1b37520, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#22 0x00007f4af0933a7c in IA__g_main_context_iteration (context=0x1b37520, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#23 0x00007f4af5f71e6f in QEventDispatcherGlib::processEvents (this=0x1b0b7e0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#24 0x00007f4af6725bef in QGuiEventDispatcherGlib::processEvents (this=0x1100000010, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x00007f4af5f47002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 45476544}) at kernel/qeventloop.cpp:149
#26 0x00007f4af5f473cd in QEventLoop::exec (this=0x7fff02b5eb00, flags={i = 45476624}) at kernel/qeventloop.cpp:200
#27 0x00007f4af5f49694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#28 0x00007f4afa6f86bb in kdemain (argc=1, argv=0x7fff02b5ee08) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/main.cpp:50
#29 0x00007f4af52f55a6 in __libc_start_main (main=0x400890 <main>, argc=1, ubp_av=0x7fff02b5ee08, init=0x4008c0 <__libc_csu_init>, fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fff02b5edf8) at libc-start.c:220
#30 0x00000000004007c9 in _start () at ../sysdeps/x86_64/elf/start.S:113

This bug may be a duplicate of or related to bug 200375

Reported using DrKonqi