Application that crashed: krunner
Version of the application: 0.1
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-1-686 i686
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
Firefox (not Iceweasel) always hangs when I try to close it, so I went to kill the hung process in System Activity app.  After killing Firefox, there was another process 'mozilla.sh' (I think) and when I clicked that to see it, the System Activity app crashed.

 -- Backtrace:
Application: Run Command Interface (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  QSortFilterProxyModelPrivate::proxy_to_source (this=<value optimized out>, proxy_index=<value optimized out>) at itemviews/qsortfilterproxymodel.cpp:320
#7  0x4bd3e8f3 in QSortFilterProxyModel::mapToSource (this=) at itemviews/qsortfilterproxymodel.cpp:2383
#8  0x4bd369bf in QSortFilterProxyModelPrivate::store_persistent_indexes (this=<value optimized out>) at itemviews/qsortfilterproxymodel.cpp:912
#9  0x4bd3cfca in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=<value optimized out>, source_top_left=<value optimized out>, source_bottom_right=<value optimized out>)
    at itemviews/qsortfilterproxymodel.cpp:1063
#10 0x4bd3e02c in QSortFilterProxyModel::qt_metacall (this=<value optimized out>, _c=<value optimized out>, _id=<value optimized out>, _a=<value optimized out>)
    at .moc/release-shared/moc_qsortfilterproxymodel.cpp:120
#11 0x4c0705ea in ProcessFilter::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libprocessui.so.4
#12 0x4af29963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#13 0x4af2a5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#14 0x4af64599 in QAbstractItemModel::dataChanged (this=) at .moc/release-shared/moc_qabstractitemmodel.cpp:126
#15 0x4c0719c9 in ?? () from /usr/lib/libprocessui.so.4
#16 0x4c0754e6 in ?? () from /usr/lib/libprocessui.so.4
#17 0x4af29963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#18 0x4af2a5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#19 0x4ad544df in KSysGuard::Processes::processChanged(KSysGuard::Process*, bool) () from /usr/lib/libprocesscore.so.4
#20 0x4ad549b2 in KSysGuard::Processes::updateProcess(KSysGuard::Process*, long, bool) () from /usr/lib/libprocesscore.so.4
#21 0x4ad55eaf in KSysGuard::Processes::updateOrAddProcess(long) () from /usr/lib/libprocesscore.so.4
#22 0x4ad55e42 in KSysGuard::Processes::updateOrAddProcess(long) () from /usr/lib/libprocesscore.so.4
#23 0x4ad5627a in KSysGuard::Processes::processesUpdated() () from /usr/lib/libprocesscore.so.4
#24 0x4ad56a8b in KSysGuard::Processes::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libprocesscore.so.4
#25 0x4af29963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#26 0x4af2a5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#27 0x4ad5ce47 in ?? () from /usr/lib/libprocesscore.so.4
#28 0x4ad59d1d in ?? () from /usr/lib/libprocesscore.so.4
#29 0x4ad54680 in KSysGuard::Processes::updateAllProcesses(long) () from /usr/lib/libprocesscore.so.4
#30 0x4c071ef2 in ProcessModel::update(int) () from /usr/lib/libprocessui.so.4
#31 0x4c064946 in KSysGuardProcessList::updateList() () from /usr/lib/libprocessui.so.4
#32 0x4c06db43 in KSysGuardProcessList::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libprocessui.so.4
#33 0x4af29963 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3112
#34 0x4af2a5a2 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3186
#35 0x4af65197 in QTimer::timeout (this=) at .moc/release-shared/moc_qtimer.cpp:128
#36 0x4af2fcbe in QTimer::timerEvent (this=<value optimized out>, e=<value optimized out>) at kernel/qtimer.cpp:261
#37 0x4af249ff in QObject::event (this=<value optimized out>, e=<value optimized out>) at kernel/qobject.cpp:1074
#38 0x4b76aa34 in QApplicationPrivate::notify_helper (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:4065
#39 0x4b772b8e in QApplication::notify (this=<value optimized out>, receiver=<value optimized out>, e=<value optimized out>) at kernel/qapplication.cpp:3605
#40 0x4c38d0fd in KApplication::notify (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at ../../kdeui/kernel/kapplication.cpp:302
#41 0x4af1484b in QCoreApplication::notifyInternal (this=<value optimized out>, receiver=<value optimized out>, event=<value optimized out>) at kernel/qcoreapplication.cpp:610
#42 0x4af43481 in QCoreApplication::sendEvent (this=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#43 QTimerInfoList::activateTimers (this=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:580
#44 0x4af3f977 in timerSourceDispatch (source=) at kernel/qeventdispatcher_glib.cpp:184
#45 idleTimerSourceDispatch (source=) at kernel/qeventdispatcher_glib.cpp:231
#46 0x4a9b5f28 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#47 0x4a9b96b3 in ?? () from /lib/libglib-2.0.so.0
#48 0x4a9b9838 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#49 0x4af3f6a1 in QEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#50 0x4b80a2a5 in QGuiEventDispatcherGlib::processEvents (this=) at kernel/qguieventdispatcher_glib.cpp:202
#51 0x4af12e9a in QEventLoop::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:149
#52 0x4af132e2 in QEventLoop::exec (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:201
#53 0x4af15739 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#54 0x4b76a8b7 in QApplication::exec () at kernel/qapplication.cpp:3525
#55 0x4c89f046 in kdemain () from /usr/lib/libkdeinit4_krunner.so
#56 0x0804e291 in launch (argc=1, _name=0x94ffdc4 "/usr/bin/krunner", args=0x94ffdd5 "", cwd=0x0, envc=0, envs=0x94ffdd9 "", reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x805109f "0")
    at ../../kinit/kinit.cpp:677
#57 0x0804ea15 in handle_launcher_request (sock=7, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#58 0x0804ef3f in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#59 0x0804f6c9 in main (argc=2, argv=0xbfe1a854, envp=0xbfe1a860) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi