Application: kwin (4.5.5 (KDE 4.5.5))
KDE Platform Version: 4.5.5 (KDE 4.5.5)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-30-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:
I was watching a video on youtube , maximized, on 720p quality, and I wanted to check something in other window. After alt+tab KWin crashed

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fb9b166a7a0 (LWP 2029))]

Thread 2 (Thread 0x7fb98c9de700 (LWP 2033)):
#0  0x00007fb9ad72fe0d in QEventDispatcherUNIXPrivate::doSelect (this=0x2dfc230, flags=<value optimized out>, timeout=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:228
#1  0x00007fb9ad73081b in QEventDispatcherUNIX::processEvents (this=0x2ab3d10, flags=) at kernel/qeventdispatcher_unix.cpp:919
#2  0x00007fb9ad6ffa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#3  0x00007fb9ad6ffdec in QEventLoop::exec (this=0x7fb98c9ddcb0, flags=) at kernel/qeventloop.cpp:201
#4  0x00007fb9ad60a2fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#5  0x00007fb9ad6df5f8 in QInotifyFileSystemWatcherEngine::run (this=0x2a91240) at io/qfilesystemwatcher_inotify.cpp:248
#6  0x00007fb9ad60d27e in QThreadPrivate::start (arg=0x2a91240) at thread/qthread_unix.cpp:266
#7  0x00007fb9aec38893 in ?? () from /usr/lib/libGL.so.1
#8  0x00007fb9ad382971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#9  0x00007fb9b0ef692d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fb9b166a7a0 (LWP 2029)):
[KCrash Handler]
#6  0x00007fb9b1266568 in KWin::EffectsHandlerImpl::currentTabBoxWindowList (this=<value optimized out>) at ../../kwin/effects.cpp:715
#7  0x00007fb993dcedba in KWin::FlipSwitchEffect::paintScreen (this=0x2958590, mask=32, region=<value optimized out>, data=...) at ../../../kwin/effects/flipswitch/flipswitch.cpp:151
#8  0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#9  0x00007fb993d6b219 in KWin::DesktopGridEffect::paintScreen (this=<value optimized out>, mask=32, region=<value optimized out>, data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#10 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#11 0x00007fb9af82591f in KWin::Effect::paintScreen (this=<value optimized out>, mask=32, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#12 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#13 0x00007fb993da6b05 in KWin::SlideEffect::paintScreen (this=<value optimized out>, mask=<value optimized out>, region=<value optimized out>, data=...) at ../../../kwin/effects/slide/slide.cpp:86
#14 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#15 0x00007fb993d65c02 in KWin::BoxSwitchEffect::paintScreen (this=0x2b5cdf0, mask=32, region=) at ../../../kwin/effects/boxswitch/boxswitch.cpp:142
#16 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#17 0x00007fb993dc0342 in KWin::CubeEffect::paintScreen (this=<value optimized out>, mask=32, region=) at ../../../kwin/effects/cube/cube.cpp:697
#18 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#19 0x00007fb9af82591f in KWin::Effect::paintScreen (this=<value optimized out>, mask=32, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#20 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#21 0x00007fb9af82591f in KWin::Effect::paintScreen (this=<value optimized out>, mask=32, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#22 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#23 0x00007fb993db6c64 in KWin::CoverSwitchEffect::paintScreen (this=0x2b726a0, mask=32, region=<value optimized out>, data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:124
#24 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#25 0x00007fb9af82591f in KWin::Effect::paintScreen (this=<value optimized out>, mask=32, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#26 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#27 0x00007fb993dafe11 in KWin::ZoomEffect::paintScreen (this=<value optimized out>, mask=32, region=) at ../../../kwin/effects/zoom/zoom.cpp:73
#28 0x00007fb9b12655be in KWin::EffectsHandlerImpl::paintScreen (this=0x28ec710, mask=32, region=) at ../../kwin/effects.cpp:168
#29 0x00007fb9b124d205 in KWin::Scene::paintScreen (this=0x2839830, mask=0x7fff01b4149c, region=0x7fff01b415c0) at ../../kwin/scene.cpp:137
#30 0x00007fb9b125de10 in KWin::SceneOpenGL::paint (this=0x2839830, damage=<value optimized out>, toplevels=<value optimized out>) at ../../kwin/scene_opengl.cpp:764
#31 0x00007fb9b1248317 in KWin::Workspace::performCompositing (this=<value optimized out>) at ../../kwin/composite.cpp:454
#32 0x00007fb9b11c97dd in KWin::Workspace::qt_metacall (this=0x260a940, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff01b41770) at ./workspace.moc:583
#33 0x00007fb9ad718b27 in QMetaObject::activate (sender=0x260ae08, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x4) at kernel/qobject.cpp:3280
#34 0x00007fb9ad7128f9 in QObject::event (this=0x260ae08, e=0x7fff01b3ffd8) at kernel/qobject.cpp:1183
#35 0x00007fb9ac84afdc in QApplicationPrivate::notify_helper (this=0x26400e0, receiver=0x260ae08, e=0x7fff01b41ec0) at kernel/qapplication.cpp:4396
#36 0x00007fb9ac850aed in QApplication::notify (this=0x7fff01b422b0, receiver=0x260ae08, e=0x7fff01b41ec0) at kernel/qapplication.cpp:4277
#37 0x00007fb9b09f0586 in KApplication::notify (this=0x7fff01b422b0, receiver=0x260ae08, event=0x7fff01b41ec0) at ../../kdeui/kernel/kapplication.cpp:310
#38 0x00007fb9ad700cdc in QCoreApplication::notifyInternal (this=0x7fff01b422b0, receiver=0x260ae08, event=0x7fff01b41ec0) at kernel/qcoreapplication.cpp:732
#39 0x00007fb9ad7306f2 in sendEvent (this=0x2640af0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#40 QTimerInfoList::activateTimers (this=0x2640af0) at kernel/qeventdispatcher_unix.cpp:602
#41 0x00007fb9ad73082c in QEventDispatcherUNIX::processEvents (this=0x261bdd0, flags=) at kernel/qeventdispatcher_unix.cpp:923
#42 0x00007fb9ac8fec2f in QEventDispatcherX11::processEvents (this=<value optimized out>, flags=) at kernel/qeventdispatcher_x11.cpp:152
#43 0x00007fb9ad6ffa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#44 0x00007fb9ad6ffdec in QEventLoop::exec (this=0x7fff01b421f0, flags=) at kernel/qeventloop.cpp:201
#45 0x00007fb9ad703ebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#46 0x00007fb9b11e5f9d in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kwin/main.cpp:531
#47 0x00007fb9b0e2ed8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff01b428b8) at libc-start.c:226
#48 0x0000000000400669 in _start ()

This bug may be a duplicate of or related to bug 264897.

Possible duplicates by query: bug 264897.

Reported using DrKonqi