Application: plasma-desktop (0.3)
KDE Platform Version: 4.3.95 (KDE 4.3.95 (KDE 4.4 RC2))
Qt Version: 4.6.0
Operating System: Linux 2.6.32-11-generic x86_64
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
"All Widgets", first batch are shown, when right side arrow is clicked however, it goes blank. Adding a widget is possible when selected by another category, however, the crash will occur the moment the you try to close "Add Widgets" (using the X on it's window)
Some other info:
Platform Version 4.3.95 (KDE 4.3.95 (KDE 4.4 RC2))
Kubuntu 10.04 (development branch)
uname -a:
Linux acer64 2.6.32-11-generic #15-Ubuntu SMP Tue Jan 19 20:38:41 UTC 2010 x86_64 GNU/Linux

The crash can be reproduced every time.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently asm".
[Current thread is 1 (Thread 0x7fe458af9800 (LWP 2385))]

Thread 2 (Thread 0x7fe435c4d710 (LWP 2386)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe456fd766b in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x156f8f8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x156f8f8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007fe45578307c in QHostInfoAgent::run (this=0x156f8e0) at kernel/qhostinfo.cpp:252
#4  0x00007fe456fd66b5 in QThreadPrivate::start (arg=0x156f8e0) at thread/qthread_unix.cpp:244
#5  0x00007fe456d46b14 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007fe455b0707d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe458af9800 (LWP 2385)):
[KCrash Handler]
#5  QGraphicsScenePrivate::processDirtyItemsRecursive (this=0x11ff640, item=0x2243d80, dirtyAncestorContainsChildren=false, parentOpacity=0) at graphicsview/qgraphicsscene.cpp:4895
#6  0x00007fe45689103d in QGraphicsScenePrivate::_q_processDirtyItems (this=0x11ff640) at graphicsview/qgraphicsscene.cpp:466
#7  0x00007fe456891682 in QGraphicsScene::qt_metacall (this=0x11f7640, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x223d440) at .moc/release-shared/moc_qgraphicsscene.cpp:130
#8  0x00007fe44e526165 in Plasma::Corona::qt_metacall (this=0x11ff640, _c=35929472, _id=0, _a=0x1) at ./corona.moc:107
#9  0x00007fe44ad8add3 in DesktopCorona::qt_metacall (this=0x11ff640, _c=35929472, _id=0, _a=0x1) at ./desktopcorona.moc:78
#10 0x00007fe4570d9789 in QObject::event (this=0x11f7640, e=0x2238320) at kernel/qobject.cpp:1260
#11 0x00007fe45688d690 in QGraphicsScene::event (this=0x11f7640, event=0x2238320) at graphicsview/qgraphicsscene.cpp:3450
#12 0x00007fe45626ef2c in QApplicationPrivate::notify_helper (this=0x10b4820, receiver=0x11f7640, e=0x2238320) at kernel/qapplication.cpp:4242
#13 0x00007fe45627553d in QApplication::notify (this=0x109e680, receiver=0x11f7640, e=0x2238320) at kernel/qapplication.cpp:4125
#14 0x00007fe45760eb66 in KApplication::notify (this=0x109e680, receiver=0x11f7640, event=0x2238320) at ../../kdeui/kernel/kapplication.cpp:302
#15 0x00007fe4570c9abc in QCoreApplication::notifyInternal (this=0x109e680, receiver=0x11f7640, event=0x2238320) at kernel/qcoreapplication.cpp:704
#16 0x00007fe4570cc237 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1031600) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1031600) at kernel/qcoreapplication.cpp:1345
#18 0x00007fe4570f3513 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#19 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#20 0x00007fe4522c47b0 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#21 0x00007fe4522c85e8 in ?? () from /lib/libglib-2.0.so.0
#22 0x00007fe4522c87cc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#23 0x00007fe4570f3053 in QEventDispatcherGlib::processEvents (this=0x1032c10, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#24 0x00007fe45631d3de in QGuiEventDispatcherGlib::processEvents (this=0x11ff640, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x00007fe4570c83e2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#26 0x00007fe4570c87bc in QEventLoop::exec (this=0x7fff94fbd990, flags=) at kernel/qeventloop.cpp:201
#27 0x00007fe4570cc4fb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#28 0x00007fe44ad91ec2 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/desktop/shell/main.cpp:112
#29 0x0000000000406fb8 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=0x40a4c1 "0") at ../../kinit/kinit.cpp:706
#30 0x0000000000407c70 in handle_launcher_request (sock=7, who=<value optimized out>) at ../../kinit/kinit.cpp:1198
#31 0x00000000004081ff in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1391
#32 0x0000000000408e0a in main (argc=4, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1830

This bug may be a duplicate of or related to bug 221586.

Possible duplicates by query: bug 224660, bug 224538, bug 224524, bug 224522, bug 224499.

Reported using DrKonqi