KWin crashes during logout of KDE session

[Nightfall]

During logout of the KDE session, KWin crashes.

Reproducible: Most of the time

Steps to reproduce:
1. Open desktop context menu
2. Click on Leave ...
3. Click on Logout

Actual result:
After some seconds, KWin crashes

Expected result:
User is logged out without crash

Versions:
Kubuntu raring (daily iso of 2013-04-12), running as live system
KDE 4.10.2
KWin 4.10.2

System information:
Graphics chip: NVIDIA Corporation G72M [GeforceGo 7400]
Driver: nouveau (xserver-xorg-video-nouveau 1.0.7-0ubuntu1)

Backtrace:

Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb118d740 (LWP 6338))]

Thread 2 (Thread 0xaa20db40 (LWP 6350)):
#0 0xb776c424 in __kernel_vsyscall ()
#1 0xb21f784b in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2 0xb7547d7c in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3 0xb66620ed in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4 0xb666211f in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5 0xb21f3d78 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6 0xb753a3de in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb118d740 (LWP 6338)):
[KCrash Handler]
#7 PUSH_RESRC (tor=<optimized out>, data=<optimized out>, r=<optimized out>, bin=<optimized out>, mthd=<optimized out>, push=<optimized out>, subc=<optimized out>, access=<optimized out>, vor=<optimized out>) at nv30_winsys.h:107
#8 nv30_vbo_validate (nv30=0x86d9a08) at nv30_vbo.c:239
#9 0xad843cd2 in nv30_state_validate (nv30=nv30@entry=0x86d9a08, hwtnl=hwtnl@entry=1 '\001') at nv30_state_validate.c:487
#10 0xad821945 in nv30_clear (pipe=0x86d9a08, buffers=1, color=0xbfab8dfc, depth=1, stencil=0) at nv30_clear.c:61
#11 0xac8a56f2 in st_Clear (ctx=0x87428b8, mask=2) at ../../../../../src/mesa/state_tracker/st_cb_clear.c:556
#12 0xac42af37 in _mesa_Clear (mask=16384) at ../../../../../src/mesa/main/clear.c:233
#13 0xb76d3915 in KWin::SceneOpenGL::paintBackground (this=this@entry=0x87a09d0, region=...) at ../../kwin/scene_opengl.cpp:349
#14 0xb76c6262 in KWin::Scene::paintGenericScreen (this=0x87a09d0, orig_mask=32) at ../../kwin/scene.cpp:194
#15 0xb76db811 in KWin::SceneOpenGL2::paintGenericScreen (this=this@entry=0x87a09d0, mask=mask@entry=32, data=...) at ../../kwin/scene_opengl.cpp:516
#16 0xb76c4f78 in KWin::Scene::finalPaintScreen (this=0x87a09d0, mask=32, region=..., data=...) at ../../kwin/scene.cpp:184
#17 0xb76ea893 in KWin::EffectsHandlerImpl::paintScreen (this=0x88f53b8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:254
#18 0xaa274469 in KWin::LogoutEffect::paintScreen (this=0x898aa98, mask=32, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:193
#19 0xb76ea83b in KWin::EffectsHandlerImpl::paintScreen (this=0x88f53b8, mask=mask@entry=32, region=..., data=...) at ../../kwin/effects.cpp:251
#20 0xb694638a in KWin::Effect::paintScreen (this=0x8933c18, mask=32, region=..., data=...) at ../../../kwin/libkwineffects/kwineffects.cpp:489
#21 0xb76ea83b in KWin::EffectsHandlerImpl::paintScreen (this=0x88f53b8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:251
#22 0xb76c64ce in KWin::Scene::paintScreen (this=0x87a09d0, mask=0xbfab93bc, region=0xbfab942c) at ../../kwin/scene.cpp:140
#23 0xb76d51cb in KWin::SceneOpenGL::paint (this=0x87a09d0, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:308
#24 0xb76bed10 in KWin::Compositor::performCompositing (this=0x86847d0) at ../../kwin/composite.cpp:610
#25 0xb5f892d4 in QObject::event (this=0x86847d0, e=0xbfab9950) at kernel/qobject.cpp:1156
#26 0xb545cc7c in QApplicationPrivate::notify_helper (this=0x8565370, receiver=0x86847d0, e=0xbfab9950) at kernel/qapplication.cpp:4567
#27 0xb545fb94 in QApplication::notify (this=0xbfab9950, receiver=0x86847d0, e=0xbfab9950) at kernel/qapplication.cpp:3949
#28 0xb71f6d01 in KApplication::notify (this=0xbfab9d18, receiver=0x86847d0, event=0xbfab9950) at ../../kdeui/kernel/kapplication.cpp:311
#29 0xb766be0f in notify (e=0xbfab9950, o=0x86847d0, this=0xbfab9d18) at ../../kwin/main.cpp:371
#30 KWin::Application::notify (this=0xbfab9d18, o=0x86847d0, e=0xbfab9950) at ../../kwin/main.cpp:367
#31 0xb5f6d90e in QCoreApplication::notifyInternal (this=0xbfab9d18, receiver=0x86847d0, event=0xbfab9950) at kernel/qcoreapplication.cpp:946
#32 0xb5fa28c0 in sendEvent (event=0xbfab9950, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QTimerInfoList::activateTimers (this=0x8565c14) at kernel/qeventdispatcher_unix.cpp:622
#34 0xb5fa2945 in QEventDispatcherUNIX::activateTimers (this=0x8565c14, this@entry=0x8522ea0) at kernel/qeventdispatcher_unix.cpp:879
#35 0xb5fa2ab8 in QEventDispatcherUNIX::processEvents (this=0x8522ea0, flags=...) at kernel/qeventdispatcher_unix.cpp:941
#36 0xb55145f3 in QEventDispatcherX11::processEvents (this=0x8522ea0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#37 0xb5f6c3ec in QEventLoop::processEvents (this=this@entry=0xbfab9b98, flags=...) at kernel/qeventloop.cpp:149
#38 0xb5f6c6e1 in QEventLoop::exec (this=0xbfab9b98, flags=...) at kernel/qeventloop.cpp:204
#39 0xb5f723fa in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#40 0xb545afc4 in QApplication::exec () at kernel/qapplication.cpp:3828
#41 0xb766b8c1 in kdemain (argc=1, argv=0xbfab9e04) at ../../kwin/main.cpp:537
#42 0x0804855b in main (argc=1, argv=0xbfab9e04) at kwin_dummy.cpp:3

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
Uname: Linux 3.8.0-17-generic i686
ApportVersion: 2.9.2-0ubuntu8
Architecture: i386
CasperVersion: 1.330
Date: Sat Apr 13 21:48:59 2013
LiveMediaBuild: Kubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130413)
MarkForUpload: True
ProcEnviron:
 SHELL=/bin/bash
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 XDG_RUNTIME_DIR=<set>
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)

[penalvch (penalvch)]

Nightfall, thank you for reporting this and helping make Ubuntu better. However, your crash report is missing.

Please follow these instructions to have apport report a new bug about your crash that can be dealt with by the automatic retracer. First, execute at a terminal:
cd /var/crash && sudo rm * ; sudo apt-get update && sudo apt-get -y dist-upgrade && sudo service apport start force_start=1

If you are running the Ubuntu Stable Release you might need to enable apport in /etc/default/apport and restart. Now reproduce the crash, then open a terminal, navigate to your /var/crash directory and file your report with:
sudo ubuntu-bug /var/crash/_my_crash_report.crash

where _my_crash_report.crash is the crash you would like to report. By default, this sends the crash to the Ubuntu Error Tracker infrastructure, which is different than Launchpad. For more on this, please see https://wiki.ubuntu.com/ErrorTracker .

However, if after doing this you would still like to have a crash report posted to Launchpad, for example to ease triage and add others to your report, one would need to open the following file via a terminal:
sudo nano /etc/apport/crashdb.conf

and comment out the line:
'problem_types': ['Bug', 'Package'],

by changing it to:
# 'problem_types': ['Bug', 'Package'],

Save, close, and file the crash report via:
sudo ubuntu-bug /var/crash/FILENAME.crash

Where FILENAME is the actual name of the file found in the folder.

However, this report is being closed since the process outlined above will deal with this issue more efficiently.

Also, please do not attach your crash report manually to this report and reopen it.

Thank you for your help.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs