Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-020630-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
After a resume from suspend to ram a notification appeard, saying that my system were to slow to use compositing. Shortly after that plasma-desktop crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit), signal: Segmentation fault
[Current thread is 0 (LWP 4772)]

Thread 2 (Thread 0x7f81e8022950 (LWP 4781)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f8208d40ce9 in QWaitCondition::wait (this=0x1ad4670, mutex=0x1ad4668, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f8207bcc5dc in QHostInfoAgent::run (this=0x1ad4650) at kernel/qhostinfo.cpp:260
#3  0x00007f8208d3fd02 in QThreadPrivate::start (arg=0x1ad4650) at thread/qthread_unix.cpp:189
#4  0x00007f8204c103ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f82057f4fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f82092fc750 (LWP 4772)):
[KCrash Handler]
#5  0x00007f820075a76b in Plasma::Extender::items (this=0x17f1e60) at /build/buildd/kde4libs-4.2.90/plasma/extender.cpp:149
#6  0x00007f820075b562 in Plasma::Extender::item (this=<value optimized out>, name=@0x7fffdc67aec0) at /build/buildd/kde4libs-4.2.90/plasma/extender.cpp:180
#7  0x00007f820075b669 in Plasma::Extender::group (this=0x7fffdc67abe0, name=@0x15f2310) at /build/buildd/kde4libs-4.2.90/plasma/extender.cpp:191
#8  0x00007f81eae1f05d in SystemTray::ExtenderTaskBusyWidget::updateTask (this=0x1862970) at /build/buildd/kdebase-workspace-4.2.90/plasma/applets/systemtray/core/extendertask.cpp:151
#9  0x00007f81eae1fa8d in SystemTray::ExtenderTaskBusyWidget::qt_metacall (this=0x1862970, _c=QMetaObject::InvokeMetaMethod, _id=25102080, _a=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.2.90/obj-x86_64-linux-gnu/plasma/applets/systemtray/extendertask.moc:69
#10 0x00007f8208e3e8d2 in QMetaObject::activate (sender=0x15f84b0, from_signal_index=<value optimized out>, to_signal_index=9, argv=0x2303bc0) at kernel/qobject.cpp:3120
#11 0x00007f81eae201d2 in SystemTray::Manager::notificationRemoved (this=0x7fffdc67abe0, _t1=0x1bcb020)
    at /build/buildd/kdebase-workspace-4.2.90/obj-x86_64-linux-gnu/plasma/applets/systemtray/manager.moc:160
#12 0x00007f81eae21277 in SystemTray::Manager::qt_metacall (this=0x15f84b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdc67b1b0)
    at /build/buildd/kdebase-workspace-4.2.90/obj-x86_64-linux-gnu/plasma/applets/systemtray/manager.moc:110
#13 0x00007f8208e3e8d2 in QMetaObject::activate (sender=0x1bcb020, from_signal_index=<value optimized out>, to_signal_index=7, argv=0x2303bc0) at kernel/qobject.cpp:3120
#14 0x00007f81eae22347 in SystemTray::Notification::destroyed (this=0x7fffdc67abe0, _t1=0x1bcb020)
    at /build/buildd/kdebase-workspace-4.2.90/obj-x86_64-linux-gnu/plasma/applets/systemtray/notification.moc:101
#15 0x00007f81eae2281b in ~Notification (this=0x7fffdc67abe0) at /build/buildd/kdebase-workspace-4.2.90/plasma/applets/systemtray/core/notification.cpp:64
#16 0x00007f81eae2fad1 in ~DBusNotification (this=0x1bcb020) at /build/buildd/kdebase-workspace-4.2.90/plasma/applets/systemtray/protocols/notifications/dbusnotification.cpp:38
#17 0x00007f8208e38f45 in QObject::event (this=0x1bcb020, e=0x15f2310) at kernel/qobject.cpp:1101
#18 0x00007f82063cbb9d in QApplicationPrivate::notify_helper (this=0x101c7e0, receiver=0x1bcb020, e=0x249e180) at kernel/qapplication.cpp:4057
#19 0x00007f82063d3dea in QApplication::notify (this=0xfdb870, receiver=0x1bcb020, e=0x249e180) at kernel/qapplication.cpp:4022
#20 0x00007f820750806b in KApplication::notify (this=0xfdb870, receiver=0x1bcb020, event=0x249e180) at /build/buildd/kde4libs-4.2.90/kdeui/kernel/kapplication.cpp:302
#21 0x00007f8208e28dfc in QCoreApplication::notifyInternal (this=0xfdb870, receiver=0x1bcb020, event=0x249e180) at kernel/qcoreapplication.cpp:610
#22 0x00007f8208e29a6a in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xf89100) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 0x00007f8208e528a3 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#24 0x00007f8204e5f20a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0x00007f8204e628e0 in ?? () from /usr/lib/libglib-2.0.so.0
#26 0x00007f8204e62a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0x00007f8208e5252f in QEventDispatcherGlib::processEvents (this=0x101c140, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#28 0x00007f820646470f in QGuiEventDispatcherGlib::processEvents (this=0x7fffdc67abe0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#29 0x00007f8208e276a2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -597181792}) at kernel/qeventloop.cpp:149
#30 0x00007f8208e27a6d in QEventLoop::exec (this=0x7fffdc67bae0, flags={i = -597181712}) at kernel/qeventloop.cpp:200
#31 0x00007f8208e29d34 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#32 0x00007f81fcc707eb in kdemain (argc=1, argv=0xfccc50) at /build/buildd/kdebase-workspace-4.2.90/plasma/shells/desktop/main.cpp:50
#33 0x000000000040714e in launch (argc=1, _name=0xfe8f48 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0xfe8f68 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a308 "0") at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:671
#34 0x0000000000407978 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1163
#35 0x0000000000407f25 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1356
#36 0x0000000000408a66 in main (argc=2, argv=0x7fffdc67c978, envp=0x7fffdc67c990) at /build/buildd/kde4libs-4.2.90/kinit/kinit.cpp:1783

Reported using DrKonqi