Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.33-0.slh.5-sidux-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
I was running Virtualbox session and plasma-desktop crashes in the host system. The CPU was at 60%. After the crash plasma-desktop restarts soon.
I don't know if Virtualbox is related to the crash; I just reported it.

 -- Backtrace:
Application: Spazio di lavoro di Plasma (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7f549ae5d750 (LWP 2643))]

Thread 2 (Thread 0x7f547986f910 (LWP 2649)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f549a897499 in QWaitConditionPrivate::wait (this=0x1fb7b40, mutex=0x1fb7b38, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=0x1fb7b40, mutex=0x1fb7b38, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f5496c803b4 in QHostInfoAgent::run (this=0x1fb7b20) at kernel/qhostinfo.cpp:260
#4  0x00007f549a8964a5 in QThreadPrivate::start (arg=0x1fb7b20) at thread/qthread_unix.cpp:188
#5  0x00007f54975bc73a in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007f549818669d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f549ae5d750 (LWP 2643)):
[KCrash Handler]
#5  KDirModelNode::rowNumber (this=0x0) at ../../kio/kio/kdirmodel.cpp:120
#6  0x00007f5499a77ae1 in KDirModelPrivate::indexForNode (this=<value optimized out>, node=<value optimized out>, rowNumber=-1) at ../../kio/kio/kdirmodel.cpp:284
#7  0x00007f5499a7c4b6 in KDirModelPrivate::_k_slotNewItems (this=0x1c07690, directoryUrl=<value optimized out>, items=...) at ../../kio/kio/kdirmodel.cpp:377
#8  0x00007f5499a7d896 in KDirModel::qt_metacall (this=0x1c0e080, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff753f75b0) at ./kdirmodel.moc:82
#9  0x00007f549a990df2 in QMetaObject::activate (sender=0x1e2c7d0, from_signal_index=<value optimized out>, to_signal_index=14, argv=0xffffffff) at kernel/qobject.cpp:3112
#10 0x00007f5499a616ca in KDirLister::itemsAdded (this=0x0, _t1=<value optimized out>, _t2=<value optimized out>) at ./kdirlister.moc:268
#11 0x00007f5499a6247a in KDirLister::Private::emitItems (this=0x1e56d70) at ../../kio/kio/kdirlister.cpp:2303
#12 0x00007f5499a6dc18 in KDirListerCache::processPendingUpdates (this=0x1c080b0) at ../../kio/kio/kdirlister.cpp:1796
#13 0x00007f5499a6e57e in KDirListerCache::slotFilesChanged (this=0x1c080b0, fileList=...) at ../../kio/kio/kdirlister.cpp:850
#14 0x00007f5499a73af0 in KDirListerCache::qt_metacall (this=0x1c080b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff753f7990) at ./kdirlister_p.moc:93
#15 0x00007f549a990df2 in QMetaObject::activate (sender=0x1c046f0, from_signal_index=<value optimized out>, to_signal_index=8, argv=0xffffffff) at kernel/qobject.cpp:3112
#16 0x00007f5499a7ede5 in OrgKdeKDirNotifyInterface::FilesChanged (this=0x0, _t1=<value optimized out>) at ./kdirnotify.moc:118
#17 0x00007f5499a7ef50 in OrgKdeKDirNotifyInterface::qt_metacall (this=0x1c046f0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff753f7a90) at ./kdirnotify.moc:82
#18 0x00007f54969aab83 in QDBusConnectionPrivate::deliverCall (this=0x1848810, object=0x1c046f0, msg=..., metaTypes=..., slotIdx=8) at qdbusintegrator.cpp:891
#19 0x00007f54969b235f in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib/libQtDBus.so.4
#20 0x00007f549a98b6c8 in QObject::event (this=0x1c046f0, e=0x25d04d0) at kernel/qobject.cpp:1110
#21 0x00007f54988fb01d in QApplicationPrivate::notify_helper (this=0x18502d0, receiver=0x1c046f0, e=0x25d04d0) at kernel/qapplication.cpp:4065
#22 0x00007f549890307a in QApplication::notify (this=0x1847030, receiver=0x1c046f0, e=0x25d04d0) at kernel/qapplication.cpp:4030
#23 0x00007f5499552de6 in KApplication::notify (this=0x1847030, receiver=0x1c046f0, event=0x25d04d0) at ../../kdeui/kernel/kapplication.cpp:302
#24 0x00007f549a97bc9c in QCoreApplication::notifyInternal (this=0x1847030, receiver=0x1c046f0, event=0x25d04d0) at kernel/qcoreapplication.cpp:610
#25 0x00007f549a97c8e4 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x17bc950) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x17bc950) at kernel/qcoreapplication.cpp:1247
#27 0x00007f549a9a47d3 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#28 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#29 0x00007f549780d90e in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x00007f54978112c8 in ?? () from /lib/libglib-2.0.so.0
#31 0x00007f54978113f0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0x00007f549a9a439c in QEventDispatcherGlib::processEvents (this=0x17bf220, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#33 0x00007f5498991f1f in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007f549a97a562 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#35 0x00007f549a97a934 in QEventLoop::exec (this=0x7fff753f8600, flags=...) at kernel/qeventloop.cpp:201
#36 0x00007f549a97cba4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x00007f548e3e92bf in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#38 0x0000000000406e9e in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a057 "0") at ../../kinit/kinit.cpp:677
#39 0x0000000000407aad in handle_launcher_request (sock=7, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#40 0x0000000000407f91 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#41 0x00000000004086c6 in main (argc=2, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1793
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi