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http://bugs.kde.org/show_bug.cgi?id=157044         
           Summary: kwin crashes after changing the settings from 'shared
                    memory' back to the previous version
           Product: kwin
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: NEW
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: kwin kde org
        ReportedBy: jos vandenoever info


Version:           > 4 (using Devel)
Installed from:    Compiled sources
Compiler:          gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2) Target: x86_64-linux-gnu
OS:                Linux

I'm just pasting the backtrace here.
Graphics card is ATI X1650 with ati binary driver version 8.45.4

Application: KWin (kwin), signal SIGABRT
Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 47793551041664 (LWP 6019)]
[KCrash handler]
#5  0x00002b77cc7ab765 in raise () from /lib/libc.so.6
#6  0x00002b77cc7ad1c0 in abort () from /lib/libc.so.6
#7  0x00002b77cc7a4c2f in __assert_fail () from /lib/libc.so.6
#8  0x00002b77c6e862eb in KWin::SceneOpenGL::paint (this=0x9c0fd0, 
    damage= 0x7fffe3ed8d10, toplevels= 0x7fffe3ed8d00)
    at /home/kde-devel/src/KDE/kdebase/workspace/kwin/scene_opengl.cpp:612
#9  0x00002b77c6e76a48 in KWin::Workspace::performCompositing (this=0x6cae70)
    at /home/kde-devel/src/KDE/kdebase/workspace/kwin/composite.cpp:327
#10 0x00002b77c6e158c1 in KWin::Workspace::qt_metacall (this=0x6cae70, 
    _c=QMetaObject::InvokeMetaMethod, _id=135, _a=0x7fffe3ed8e30)
    at /home/kde-devel/build/KDE/kdebase/workspace/kwin/workspace.moc:427
#11 0x00002b77c8e62038 in QMetaObject::activate (sender=0x6cb268, 
    from_signal_index=4, to_signal_index=4, argv=0x0)
    at kernel/qobject.cpp:3087
#12 0x00002b77c8e62483 in QMetaObject::activate (sender=0x6cb268, 
    m=0x2b77c911e980, local_signal_index=0, argv=0x0)
    at kernel/qobject.cpp:3149
#13 0x00002b77c8e8583c in QTimer::timeout (this=0x6cb268)
    at .moc/debug-shared/moc_qtimer.cpp:125
#14 0x00002b77c8e6d2fc in QTimer::timerEvent (this=0x6cb268, e=0x7fffe3ed9b30)
    at kernel/qtimer.cpp:259
#15 0x00002b77c8e62bf8 in QObject::event (this=0x6cb268, e=0x7fffe3ed9b30)
    at kernel/qobject.cpp:1095
#16 0x00002b77ca04ab41 in QApplicationPrivate::notify_helper (this=0x61c270, 
    receiver=0x6cb268, e=0x7fffe3ed9b30) at kernel/qapplication.cpp:3556
#17 0x00002b77ca04ae60 in QApplication::notify (this=0x7fffe3eda010, 
    receiver=0x6cb268, e=0x7fffe3ed9b30) at kernel/qapplication.cpp:3115
#18 0x00002b77cb03c0de in KApplication::notify (this=0x7fffe3eda010, 
    receiver=0x6cb268, event=0x7fffe3ed9b30)
    at /home/kde-devel/src/KDE/kdelibs/kdeui/kernel/kapplication.cpp:311
#19 0x00002b77c6e3206b in KWin::Application::notify (this=0x7fffe3eda010, 
    o=0x6cb268, e=0x7fffe3ed9b30)
    at /home/kde-devel/src/KDE/kdebase/workspace/kwin/main.cpp:287
#20 0x00002b77c8e5118a in QCoreApplication::notifyInternal (
    this=0x7fffe3eda010, receiver=0x6cb268, event=0x7fffe3ed9b30)
    at kernel/qcoreapplication.cpp:530
#21 0x00002b77c8e54333 in QCoreApplication::sendEvent (receiver=0x6cb268, 
    event=0x7fffe3ed9b30)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:200
#22 0x00002b77c8e79bb7 in QTimerInfoList::activateTimers (this=0x61cdc8)
    at kernel/qeventdispatcher_unix.cpp:554
#23 0x00002b77c8e79c7b in QEventDispatcherUNIX::activateTimers (this=0x61b490)
    at kernel/qeventdispatcher_unix.cpp:828
#24 0x00002b77c8e7abd3 in QEventDispatcherUNIX::processEvents (this=0x61b490, 
    flags= 0x7fffe3ed9da0) at kernel/qeventdispatcher_unix.cpp:890
#25 0x00002b77ca0d8c06 in QEventDispatcherX11::processEvents (this=0x61b490, 
    flags= 0x7fffe3ed9ec0) at kernel/qeventdispatcher_x11.cpp:145
#26 0x00002b77c8e4e475 in QEventLoop::processEvents (this=0x7fffe3ed9f70, 
    flags= 0x7fffe3ed9f30) at kernel/qeventloop.cpp:140
#27 0x00002b77c8e4e5ca in QEventLoop::exec (this=0x7fffe3ed9f70, 
    flags= 0x7fffe3ed9f90) at kernel/qeventloop.cpp:182
#28 0x00002b77c8e51940 in QCoreApplication::exec ()
    at kernel/qcoreapplication.cpp:759
#29 0x00002b77ca04a718 in QApplication::exec () at kernel/qapplication.cpp:3053
#30 0x00002b77c6e33704 in kdemain (argc=3, argv=0x7fffe3eda4d8)
    at /home/kde-devel/src/KDE/kdebase/workspace/kwin/main.cpp:427
#31 0x00000000004008f3 in main (argc=3, argv=0x7fffe3eda4d8)
    at /home/kde-devel/build/KDE/kdebase/workspace/kwin/kwin_dummy.cpp:3
#0  0x00002b77cc8142b0 in nanosleep () from /lib/libc.so.6
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