KWin crasheds when pressing Alt+Tag several times too fast in a row.


Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb57ae6e0 (LWP 10242)]
[KCrash handler]
#5  0xb7f7f60e in KWin::EffectWindowImpl::buildQuads (this=0x816e9f8)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects.cpp:1093
#6  0xb7107384 in WindowPaintData (this=0xbfdee718, w=0x816e9f8)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/lib/kwineffects.cpp:61
#7  0xb3ff91e5 in KWin::BoxSwitchEffect::paintWindowThumbnail (
    this=0x813bd40, w=0x816e9f8)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects/boxswitch.cpp:510
#8  0xb3ffb738 in KWin::BoxSwitchEffect::paintScreen (this=0x813bd40, mask=8, 
    region=@0xbfdee824, data=@0xbfdee980)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects/boxswitch.cpp:96
#9  0xb7f838fe in KWin::EffectsHandlerImpl::paintScreen (this=0x8114bc0, 
    mask=8, region=@0xbfdee870, data=@0xbfdee980)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects.cpp:102
#10 0xb4002771 in KWin::DesktopGridEffect::paintScreen (this=0x813ab48, 
    mask=8, region=@0xbfdee8c4, data=@0xbfdee980)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects/desktopgrid.cpp:120
#11 0xb7f838fe in KWin::EffectsHandlerImpl::paintScreen (this=0x8114bc0, 
    mask=8, region=@0xbfdee8fc, data=@0xbfdee980)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects.cpp:102
#12 0xb7109eda in KWin::Effect::paintScreen (this=0x813aca8, mask=8, 
    region=@0xbfdee934, data=@0xbfdee980)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/lib/kwineffects.cpp:163
#13 0xb7f838fe in KWin::EffectsHandlerImpl::paintScreen (this=0x8114bc0, 
    mask=8, region=@0xbfdee9b4, data=@0xbfdee980)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/effects.cpp:102
#14 0xb7f72b98 in KWin::Scene::paintScreen (this=0x810d458, mask=0xbfdeea04, 
    region=0xbfdeeb08)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/scene.cpp:121
#15 0xb7f7bbba in KWin::SceneOpenGL::paint (this=0x810d458, 
    damage=@0xbfdeeb08, toplevels=@0xbfdeeb04)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/scene_opengl.cpp:571
#16 0xb7f6c66f in KWin::Workspace::performCompositing (this=0x80eb528)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/composite.cpp:309
#17 0xb7f05ad9 in KWin::Workspace::qt_metacall (this=0x80eb528, 
    _c=QMetaObject::InvokeMetaMethod, _id=135, _a=0xbfdeefd8)
    at /data/althome/kdedevel/kde/build/KDE/base/workspace/kwin/workspace.moc:427
#18 0xb7094d8e in QMetaObject::activate (sender=0x80eb778, 
    from_signal_index=4, to_signal_index=4, argv=0x0)
    at kernel/qobject.cpp:3089
#19 0xb7095692 in QMetaObject::activate (sender=0x80eb778, m=0xb70f99c4, 
    local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3151
#20 0xb70b12d7 in QTimer::timeout (this=0x80eb778)
    at .moc/release-shared/moc_qtimer.cpp:125
#21 0xb709ae3e in QTimer::timerEvent (this=0x80eb778, e=0xbfdef498)
    at kernel/qtimer.cpp:261
#22 0xb7091d54 in QObject::event (this=0x80eb778, e=0xb7f7f5f4)
    at kernel/qobject.cpp:1097
#23 0xb68b91cd in QApplicationPrivate::notify_helper (this=0x8055848, 
    receiver=0x80eb778, e=0xbfdef498) at kernel/qapplication.cpp:3558
#24 0xb68bf1f9 in QApplication::notify (this=0xbfdef6fc, receiver=0x80eb778, 
    e=0xbfdef498) at kernel/qapplication.cpp:3117
#25 0xb7b0e16b in KApplication::notify (this=0xbfdef6fc, receiver=0x80eb778, 
    event=0xbfdef498)
    at /data/althome/kdedevel/kde/src/KDE/libs/kdeui/kernel/kapplication.cpp:319
#26 0xb7f22b3c in KWin::Application::notify (this=0xbfdef6fc, o=0x80eb778, 
    e=0xbfdef498)
    at /data/althome/kdedevel/kde/src/KDE/base/workspace/kwin/main.cpp:275
#27 0xb70837fb in QCoreApplication::notifyInternal (this=0xbfdef6fc, 
    receiver=0x80eb778, event=0xbfdef498) at kernel/qcoreapplication.cpp:532
#28 0xb70a7271 in QTimerInfoList::activateTimers (this=0x80585c4)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:202
#29 0xb70a4b60 in timerSourceDispatch (source=0x8058590)
    at kernel/qeventdispatcher_glib.cpp:157
#30 0xb61f71c6 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#31 0xb61fa552 in ?? () from /usr/lib/libglib-2.0.so.0
#32 0x08057890 in ?? ()
#33 0x00000000 in ?? ()
#0  0xb6517f3b in nanosleep () from /lib/libc.so.6