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:
I'm not sure whether it is reproducible.  But plasma crashes fairly often for me.  I use nvidia's binary driver 

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 26009)]

Thread 2 (Thread 0x7fca2bba8950 (LWP 26012)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007fca4d660939 in QWaitCondition::wait (this=0x2598c60, mutex=0x2598c58, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007fca4c4dc4cc in QHostInfoAgent::run (this=0x2598c40) at kernel/qhostinfo.cpp:260
#3  0x00007fca4d65f952 in QThreadPrivate::start (arg=0x2598c40) at thread/qthread_unix.cpp:189
#4  0x00007fca494e03ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007fca4a0c4fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fca4dc26750 (LWP 26009)):
[KCrash Handler]
#5  0x00007fca44a9f515 in KNS::Engine::downloadDialogModal (this=0x7fff55c5c580) at /usr/include/qt4/QtGui/qwidget.h:473
#6  0x00007fca416f4d78 in BackgroundDialog::getNewThemes (this=0x3d49d10) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/backgrounddialog.cpp:434
#7  0x00007fca416f0c48 in BackgroundDialog::qt_metacall (this=0x3d49d10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff55c5c6c0)
    at /build/buildd/kdebase-workspace-4.2.96/obj-x86_64-linux-gnu/plasma/shells/desktop/moc_backgrounddialog.cpp:142
#8  0x00007fca4d75e1f2 in QMetaObject::activate (sender=0x3be8ae0, from_signal_index=<value optimized out>, to_signal_index=30, argv=0x0) at kernel/qobject.cpp:3069
#9  0x00007fca4b316267 in QAbstractButton::clicked (this=0x417c180, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#10 0x00007fca4b073deb in QAbstractButtonPrivate::emitClicked (this=0x4182b30) at widgets/qabstractbutton.cpp:543
#11 0x00007fca4b075a52 in QAbstractButtonPrivate::click (this=0x4182b30) at widgets/qabstractbutton.cpp:536
#12 0x00007fca4b075ca5 in QAbstractButton::mouseReleaseEvent (this=0x3be8ae0, e=0x7fff55c5ce90) at widgets/qabstractbutton.cpp:1115
#13 0x00007fca4ad228cf in QWidget::event (this=0x3be8ae0, event=0x7fff55c5ce90) at kernel/qwidget.cpp:7516
#14 0x00007fca4acd178d in QApplicationPrivate::notify_helper (this=0x1c17ae0, receiver=0x3be8ae0, e=0x7fff55c5ce90) at kernel/qapplication.cpp:4084
#15 0x00007fca4acda0da in QApplication::notify (this=<value optimized out>, receiver=0x3be8ae0, e=0x7fff55c5ce90) at kernel/qapplication.cpp:3786
#16 0x00007fca4be1463b in KApplication::notify (this=0x1c0df30, receiver=0x3be8ae0, event=0x7fff55c5ce90) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#17 0x00007fca4d74875c in QCoreApplication::notifyInternal (this=0x1c0df30, receiver=0x3be8ae0, event=0x7fff55c5ce90) at kernel/qcoreapplication.cpp:602
#18 0x00007fca4acd9328 in QApplicationPrivate::sendMouseEvent (receiver=0x3be8ae0, event=0x7fff55c5ce90, alienWidget=0x3be8ae0, nativeWidget=0x3d49d10, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7fca4b735eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#19 0x00007fca4ad42e19 in QETWidget::translateMouseEvent (this=0x3d49d10, event=<value optimized out>) at kernel/qapplication_x11.cpp:4425
#20 0x00007fca4ad41a88 in QApplication::x11ProcessEvent (this=0x1c0df30, event=0x7fff55c5d9d0) at kernel/qapplication_x11.cpp:3543
#21 0x00007fca4ad6a464 in x11EventSourceDispatch (s=0x1c1b060, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#22 0x00007fca4972f20a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0x00007fca497328e0 in ?? () from /usr/lib/libglib-2.0.so.0
#24 0x00007fca49732a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0x00007fca4d771e6f in QEventDispatcherGlib::processEvents (this=0x1c0e990, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#26 0x00007fca4ad69bef in QGuiEventDispatcherGlib::processEvents (this=0x417c180, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#27 0x00007fca4d747002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1439030464}) at kernel/qeventloop.cpp:149
#28 0x00007fca4d7473cd in QEventLoop::exec (this=0x7fff55c5dd00, flags={i = 1439030560}) at kernel/qeventloop.cpp:200
#29 0x00007fca44a9f1ec in KNS::EnginePrivate::workflow (this=0x41a9ad0) at /build/buildd/kde4libs-4.2.96/knewstuff/knewstuff2/engine.cpp:145
#30 0x00007fca44a9f5a9 in KNS::Engine::downloadDialogModal (this=0x7fff55c5ddc0) at /build/buildd/kde4libs-4.2.96/knewstuff/knewstuff2/engine.cpp:199
#31 0x00007fca416f4d78 in BackgroundDialog::getNewThemes (this=0x404dce0) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/backgrounddialog.cpp:434
#32 0x00007fca416f0c48 in BackgroundDialog::qt_metacall (this=0x404dce0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff55c5df00)
    at /build/buildd/kdebase-workspace-4.2.96/obj-x86_64-linux-gnu/plasma/shells/desktop/moc_backgrounddialog.cpp:142
#33 0x00007fca4d75e1f2 in QMetaObject::activate (sender=0x3b24f00, from_signal_index=<value optimized out>, to_signal_index=30, argv=0x0) at kernel/qobject.cpp:3069
#34 0x00007fca4b316267 in QAbstractButton::clicked (this=0x417c180, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#35 0x00007fca4b073deb in QAbstractButtonPrivate::emitClicked (this=0x3b4a6d0) at widgets/qabstractbutton.cpp:543
#36 0x00007fca4b075a52 in QAbstractButtonPrivate::click (this=0x3b4a6d0) at widgets/qabstractbutton.cpp:536
#37 0x00007fca4b075ca5 in QAbstractButton::mouseReleaseEvent (this=0x3b24f00, e=0x7fff55c5e6d0) at widgets/qabstractbutton.cpp:1115
#38 0x00007fca4ad228cf in QWidget::event (this=0x3b24f00, event=0x7fff55c5e6d0) at kernel/qwidget.cpp:7516
#39 0x00007fca4acd178d in QApplicationPrivate::notify_helper (this=0x1c17ae0, receiver=0x3b24f00, e=0x7fff55c5e6d0) at kernel/qapplication.cpp:4084
#40 0x00007fca4acda0da in QApplication::notify (this=<value optimized out>, receiver=0x3b24f00, e=0x7fff55c5e6d0) at kernel/qapplication.cpp:3786
#41 0x00007fca4be1463b in KApplication::notify (this=0x1c0df30, receiver=0x3b24f00, event=0x7fff55c5e6d0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#42 0x00007fca4d74875c in QCoreApplication::notifyInternal (this=0x1c0df30, receiver=0x3b24f00, event=0x7fff55c5e6d0) at kernel/qcoreapplication.cpp:602
#43 0x00007fca4acd9328 in QApplicationPrivate::sendMouseEvent (receiver=0x3b24f00, event=0x7fff55c5e6d0, alienWidget=0x3b24f00, nativeWidget=0x404dce0, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7fca4b735eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#44 0x00007fca4ad42e19 in QETWidget::translateMouseEvent (this=0x404dce0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4425
#45 0x00007fca4ad41a88 in QApplication::x11ProcessEvent (this=0x1c0df30, event=0x7fff55c5f210) at kernel/qapplication_x11.cpp:3543
#46 0x00007fca4ad6a464 in x11EventSourceDispatch (s=0x1c1b060, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#47 0x00007fca4972f20a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#48 0x00007fca497328e0 in ?? () from /usr/lib/libglib-2.0.so.0
#49 0x00007fca49732a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#50 0x00007fca4d771e6f in QEventDispatcherGlib::processEvents (this=0x1c0e990, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#51 0x00007fca4ad69bef in QGuiEventDispatcherGlib::processEvents (this=0x417c180, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#52 0x00007fca4d747002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1439036672}) at kernel/qeventloop.cpp:149
#53 0x00007fca4d7473cd in QEventLoop::exec (this=0x7fff55c5f540, flags={i = 1439036752}) at kernel/qeventloop.cpp:200
#54 0x00007fca4d749694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#55 0x00007fca417006bb in kdemain (argc=1, argv=0x1beec60) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/main.cpp:50
#56 0x0000000000407215 in launch (argc=1, _name=0x1bf1678 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x1bf1698 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3c9 "0") at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:676
#57 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1168
#58 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1361
#59 0x0000000000408b26 in main (argc=2, argv=0x7fff55c603e8, envp=0x7fff55c60400) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1788

This bug may be a duplicate of or related to bug 194853

Reported using DrKonqi