Application: kwin (4.5.1 (KDE 4.5.1))
KDE Platform Version: 4.5.1 (KDE 4.5.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-23-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:

Holding shortcut of Desktop Grid effect (Ctrl+F8) for a short time or hitting the invese of it (F8+Ctrl).

The crash can be reproduced some of the time.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
[Current thread is 1 (Thread 0x7fb4abb657a0 (LWP 14962))]

Thread 2 (Thread 0x7fb486f86710 (LWP 14968)):
#0  0x00007fb4ab3e42e3 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fb4a7c2a76e in qt_safe_select (nfds=52, fdread=0x1e4efe0, fdwrite=0x1e4f278, fdexcept=0x1e4f510, orig_timeout=0x0) at kernel/qcore_unix.cpp:82
#2  0x00007fb4a7c2fbeb in QEventDispatcherUNIXPrivate::doSelect (this=0x1e4ee20, flags=<value optimized out>, timeout=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:219
#3  0x00007fb4a7c3081b in QEventDispatcherUNIX::processEvents (this=0x1e4e790, flags=) at kernel/qeventdispatcher_unix.cpp:919
#4  0x00007fb4a7bffa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007fb4a7bffdec in QEventLoop::exec (this=0x7fb486f85cb0, flags=) at kernel/qeventloop.cpp:201
#6  0x00007fb4a7b0a2fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#7  0x00007fb4a7bdf5f8 in QInotifyFileSystemWatcherEngine::run (this=0x1e4ae30) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fb4a7b0d27e in QThreadPrivate::start (arg=0x1e4ae30) at thread/qthread_unix.cpp:266
#9  0x00007fb4a9132953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007fb4a7882971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#11 0x00007fb4ab3eb94d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fb4abb657a0 (LWP 14962)):
[KCrash Handler]
#6  0x00007fb4ab338ba5 in raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#7  0x00007fb4ab33c6b0 in abort () at abort.c:92
#8  0x00007fb4ab758fed in KWin::EffectWindowImpl::unrefWindow (this=<value optimized out>) at ../../kwin/effects.cpp:1289
#9  0x00007fb4921d0650 in KWin::DesktopGridEffect::finish (this=0x1883080) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:1322
#10 0x00007fb4921d31b1 in KWin::DesktopGridEffect::prePaintScreen (this=0x1883080, data=<value optimized out>, time=888) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:146
#11 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#12 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#13 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#14 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#15 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#16 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#17 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#18 0x00007fb4921e40a4 in KWin::LoginEffect::prePaintScreen (this=0x186ce70, data=..., time=6) at ../../../kwin/effects/login/login.cpp:52
#19 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#20 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#21 0x00007fb492245536 in KWin::TrackMouseEffect::prePaintScreen (this=0x186e7e0, data=..., time=6) at ../../../kwin/effects/trackmouse/trackmouse.cpp:107
#22 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#23 0x00007fb4ab75ab1b in KWin::EffectsHandlerImpl::prePaintScreen (this=0x17e2ce0, data=..., time=888) at ../../kwin/effects.cpp:158
#24 0x00007fb4ab74209a in KWin::Scene::paintScreen (this=0x16d7590, mask=0x7fffcaa31c9c, region=0x7fffcaa31dc0) at ../../kwin/scene.cpp:116
#25 0x00007fb4ab753450 in KWin::SceneOpenGL::paint (this=0x16d7590, damage=<value optimized out>, toplevels=<value optimized out>) at ../../kwin/scene_opengl.cpp:754
#26 0x00007fb4ab73d2a7 in KWin::Workspace::performCompositing (this=<value optimized out>) at ../../kwin/composite.cpp:454
#27 0x00007fb4ab6be7dd in KWin::Workspace::qt_metacall (this=0x7fb48c0fac90, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffcaa31f70) at ./workspace.moc:583
#28 0x00007fb4a7c18b27 in QMetaObject::activate (sender=0x7fb48c0fb158, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0xffffffffffffffff) at kernel/qobject.cpp:3280
#29 0x00007fb4a7c128f9 in QObject::event (this=0x7fb48c0fb158, e=0x3a72) at kernel/qobject.cpp:1183
#30 0x00007fb4a6d4afdc in QApplicationPrivate::notify_helper (this=0x15abf90, receiver=0x7fb48c0fb158, e=0x7fffcaa326c0) at kernel/qapplication.cpp:4396
#31 0x00007fb4a6d50aed in QApplication::notify (this=0x7fffcaa32ab0, receiver=0x7fb48c0fb158, e=0x7fffcaa326c0) at kernel/qapplication.cpp:4277
#32 0x00007fb4aaee7156 in KApplication::notify (this=0x7fffcaa32ab0, receiver=0x7fb48c0fb158, event=0x7fffcaa326c0) at ../../kdeui/kernel/kapplication.cpp:310
#33 0x00007fb4a7c00cdc in QCoreApplication::notifyInternal (this=0x7fffcaa32ab0, receiver=0x7fb48c0fb158, event=0x7fffcaa326c0) at kernel/qcoreapplication.cpp:732
#34 0x00007fb4a7c306f2 in sendEvent (this=0x15ac9a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#35 QTimerInfoList::activateTimers (this=0x15ac9a0) at kernel/qeventdispatcher_unix.cpp:602
#36 0x00007fb4a7c3082c in QEventDispatcherUNIX::processEvents (this=0x1587e60, flags=) at kernel/qeventdispatcher_unix.cpp:923
#37 0x00007fb4a6dfec2f in QEventDispatcherX11::processEvents (this=<value optimized out>, flags=) at kernel/qeventdispatcher_x11.cpp:152
#38 0x00007fb4a7bffa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#39 0x00007fb4a7bffdec in QEventLoop::exec (this=0x7fffcaa329f0, flags=) at kernel/qeventloop.cpp:201
#40 0x00007fb4a7c03ebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#41 0x00007fb4ab6daf9d in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kwin/main.cpp:531
#42 0x00007fb4ab323d8e 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=0x7fffcaa330b8) at libc-start.c:226
#43 0x0000000000400669 in _start ()

This bug may be a duplicate of or related to bug 248647.

Possible duplicates by query: bug 255890, bug 254654, bug 248647, bug 246503, bug 244813.

Reported using DrKonqi