Application: kwin (4.8.00 (4.8.0)
KDE Platform Version: 4.8.00 (4.8.0 (Compiled from sources)
Qt Version: 4.8.0
Operating System: Linux 3.2.0-rc7+ x86_64
Distribution (Platform): Gentoo Packages

-- Information about the crash:
- What I was doing when the application crashed:
When the crash happened I was switching windows with Alt+Tab. I have changed the default effect to be Cover Switch for this.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
[Current thread is 1 (Thread 0x7f639254f780 (LWP 2646))]

Thread 3 (Thread 0x7f63873c3700 (LWP 2678)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f638c2cea4b in ?? () from /usr/lib64/dri/r600_dri.so
#2  0x0000003354608f7c in start_thread (arg=0x7f63873c3700) at pthread_create.c:301
#3  0x0000003353adaded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f6385e6b700 (LWP 2679)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x0000003a24789faa in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x3a24a8ae80) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x0000003a24789fe9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x0000003354608f7c in start_thread (arg=0x7f6385e6b700) at pthread_create.c:301
#4  0x0000003353adaded in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f639254f780 (LWP 2646)):
[KCrash Handler]
#6  0x0000003353a37d75 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#7  0x0000003353a39245 in __GI_abort () at abort.c:93
#8  0x0000003354ebcaad in __gnu_cxx::__verbose_terminate_handler () at /var/tmp/portage/sys-devel/gcc-4.6.2/work/gcc-4.6.2/libstdc++-v3/libsupc++/vterminate.cc:95
#9  0x0000003354ebac26 in __cxxabiv1::__terminate (handler=<optimized out>) at /var/tmp/portage/sys-devel/gcc-4.6.2/work/gcc-4.6.2/libstdc++-v3/libsupc++/eh_terminate.cc:40
#10 0x0000003354ebac53 in std::terminate () at /var/tmp/portage/sys-devel/gcc-4.6.2/work/gcc-4.6.2/libstdc++-v3/libsupc++/eh_terminate.cc:50
#11 0x0000003354ebb6ff in __cxxabiv1::__cxa_pure_virtual () at /var/tmp/portage/sys-devel/gcc-4.6.2/work/gcc-4.6.2/libstdc++-v3/libsupc++/pure.cc:50
#12 0x00007f638673c048 in KWin::CoverSwitchEffect::postPaintScreen (this=0x119a250) at /var/tmp/portage/kde-base/kwin-4.8.49.9999/work/kwin-4.8.49.9999/kwin/effects/coverswitch/coverswitch.cpp:411
#13 0x0000003ad16d6007 in KWin::EffectsHandlerImpl::postPaintScreen (this=0xfdf410) at /var/tmp/portage/kde-base/kwin-4.8.49.9999/work/kwin-4.8.49.9999/kwin/effects.cpp:228
#14 0x0000003ad16b3f60 in KWin::Scene::paintScreen (this=0xc5aab0, mask=0x7fffbd036e68, region=0x7fffbd036f50) at /var/tmp/portage/kde-base/kwin-4.8.49.9999/work/kwin-4.8.49.9999/kwin/scene.cpp:159
#15 0x0000003ad16caadd in KWin::SceneOpenGL::paint (this=0xc5aab0, damage=..., toplevels=<optimized out>) at /var/tmp/portage/kde-base/kwin-4.8.49.9999/work/kwin-4.8.49.9999/kwin/scene_opengl_glx.cpp:459
#16 0x0000003ad16ae098 in KWin::Workspace::performCompositing (this=0x7f638819b280) at /var/tmp/portage/kde-base/kwin-4.8.49.9999/work/kwin-4.8.49.9999/kwin/composite.cpp:417
#17 0x0000003a17d9a7f9 in QObject::event (this=0x7f638819b280, e=<optimized out>) at kernel/qobject.cpp:1157
#18 0x0000003a197da414 in notify_helper (e=0x7fffbd037630, receiver=0x7f638819b280, this=0xabebc0) at kernel/qapplication.cpp:4550
#19 QApplicationPrivate::notify_helper (this=0xabebc0, receiver=0x7f638819b280, e=0x7fffbd037630) at kernel/qapplication.cpp:4522
#20 0x0000003a197df213 in QApplication::notify (this=0x7fffbd037a40, receiver=0x7f638819b280, e=0x7fffbd037630) at kernel/qapplication.cpp:4411
#21 0x0000003716861c28 in KApplication::notify (this=0x7fffbd037a40, receiver=0x7f638819b280, event=0x7fffbd037630) at /var/tmp/portage/kde-base/kdelibs-4.8.49.9999/work/kdelibs-4.8.49.9999/kdeui/kernel/kapplication.cpp:311
#22 0x0000003a17d8196b in QCoreApplication::notifyInternal (this=0x7fffbd037a40, receiver=0x7f638819b280, event=0x7fffbd037630) at kernel/qcoreapplication.cpp:876
#23 0x0000003a17db2a4a in sendEvent (event=0x7fffbd037630, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#24 QTimerInfoList::activateTimers (this=0xabf5b8) at kernel/qeventdispatcher_unix.cpp:611
#25 0x0000003a17db32b3 in QEventDispatcherUNIX::processEvents (this=0xa5bad0, flags=...) at kernel/qeventdispatcher_unix.cpp:930
#26 0x0000003a1987f716 in QEventDispatcherX11::processEvents (this=0xa5bad0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#27 0x0000003a17d806b2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x0000003a17d80937 in QEventLoop::exec (this=0x7fffbd037980, flags=...) at kernel/qeventloop.cpp:204
#29 0x0000003a17d85565 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#30 0x0000003ad1663406 in kdemain (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-base/kwin-4.8.49.9999/work/kwin-4.8.49.9999/kwin/main.cpp:541
#31 0x0000003353a243cd in __libc_start_main (main=0x400760 <main(int, char**)>, argc=1, ubp_av=0x7fffbd038168, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffbd038158) at libc-start.c:226
#32 0x0000000000400791 in _start ()

Possible duplicates by query: bug 292249, bug 289446, bug 287966, bug 286203, bug 285381.

Reported using DrKonqi