Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
This type of crash mostly happens when closing applications in 5-10% of cases

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3313)]

Thread 2 (Thread 0xa961bb90 (LWP 3318)):
#0  0xb80c1430 in __kernel_vsyscall ()
#1  0xb658c0e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb676c2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7ebf9b2 in QWaitCondition::wait (this=0x9d37060, mutex=0x9d3705c, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  0xb77fb152 in QHostInfoAgent::run (this=0x9d37050) at kernel/qhostinfo.cpp:260
#5  0xb7ebe96e in QThreadPrivate::start (arg=0x9d37050) at thread/qthread_unix.cpp:189
#6  0xb65884ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb675d49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb6096a10 (LWP 3313)):
[KCrash Handler]
#6  0xa97ac32a in TaskManager::GroupManager::manualSortingRequest () from /usr/lib/libtaskmanager.so.4
#7  0xa97aa31b in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#8  0xa97b1f27 in ?? () from /usr/lib/libtaskmanager.so.4
#9  0xa97b2e5b in ?? () from /usr/lib/libtaskmanager.so.4
#10 0xb7fc8ca8 in QMetaObject::activate (sender=0x9d3d778, from_signal_index=22, to_signal_index=22, argv=0xbfbde19c) at kernel/qobject.cpp:3069
#11 0xb7fc9932 in QMetaObject::activate (sender=0x9d3d778, m=0xa97d4b74, local_signal_index=1, argv=0xbfbde19c) at kernel/qobject.cpp:3143
#12 0xa97c5d83 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#13 0xa97c67ab in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#14 0xa97acba5 in ?? () from /usr/lib/libtaskmanager.so.4
#15 0xa97af46a in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#16 0xb7fc8ca8 in QMetaObject::activate (sender=0x9cd59f0, from_signal_index=5, to_signal_index=5, argv=0xbfbde32c) at kernel/qobject.cpp:3069
#17 0xb7fc9932 in QMetaObject::activate (sender=0x9cd59f0, m=0xa97d4d3c, local_signal_index=1, argv=0xbfbde32c) at kernel/qobject.cpp:3143
#18 0xa97c9823 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#19 0xa97cb0cf in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#20 0xa97ccfec in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#21 0xb7fc8ca8 in QMetaObject::activate (sender=0x99f9c38, from_signal_index=6, to_signal_index=6, argv=0xbfbde49c) at kernel/qobject.cpp:3069
#22 0xb7fc9932 in QMetaObject::activate (sender=0x99f9c38, m=0xb773126c, local_signal_index=2, argv=0xbfbde49c) at kernel/qobject.cpp:3143
#23 0xb76c9853 in KWindowSystem::windowRemoved () from /usr/lib/libkdeui.so.5
#24 0xb76cc0d6 in ?? () from /usr/lib/libkdeui.so.5
#25 0xb76db7c2 in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#26 0xb76dbb3f in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#27 0xb76cc36d in ?? () from /usr/lib/libkdeui.so.5
#28 0xb757c6f9 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#29 0xb4c03e37 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#30 0xb6aa5f3e in qt_x11EventFilter (ev=0xbfbdec9c) at kernel/qapplication_x11.cpp:375
#31 0xb6ab86a8 in QApplication::x11ProcessEvent (this=0x9893ac8, event=0xbfbdec9c) at kernel/qapplication_x11.cpp:3273
#32 0xb6ae4c6a in x11EventSourceDispatch (s=0x989c6b0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0xb65d5b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0xb65d90eb in ?? () from /usr/lib/libglib-2.0.so.0
#35 0xb65d9268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0xb7fde438 in QEventDispatcherGlib::processEvents (this=0x9897180, flags={i = -1078071720}) at kernel/qeventdispatcher_glib.cpp:323
#37 0xb6ae4365 in QGuiEventDispatcherGlib::processEvents (this=0x9897180, flags={i = -1078071672}) at kernel/qguieventdispatcher_glib.cpp:202
#38 0xb7fb106a in QEventLoop::processEvents (this=0xbfbdef00, flags={i = -1078071608}) at kernel/qeventloop.cpp:149
#39 0xb7fb14aa in QEventLoop::exec (this=0xbfbdef00, flags={i = -1078071544}) at kernel/qeventloop.cpp:200
#40 0xb7fb3959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#41 0xb6a42d17 in QApplication::exec () at kernel/qapplication.cpp:3553
#42 0xb4bee510 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0804e1c0 in _start ()

This bug may be a duplicate of or related to bug 198964

Reported using DrKonqi