Application: kwin (4.6.4 (4.6.4))
KDE Platform Version: 4.6.4 (4.6.4)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed: I was trying to decide which screensaver to use. I tested the KPendulum(GL) and ir started after I clicked the "Test" button, but after I pressed de "esc" key to stop it, it crashed.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f287c0a67a0 (LWP 1270))]

Thread 3 (Thread 0x7f2860cb8700 (LWP 1291)):
#0  0x00007f287b8ed143 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f2877cca32c in qt_safe_select (nfds=15, fdread=0x3859a30, fdwrite=0x3859cc8, fdexcept=0x3859f60, orig_timeout=<value optimized out>) at kernel/qcore_unix.cpp:82
#2  0x00007f2877ccf3d0 in QEventDispatcherUNIXPrivate::doSelect (this=0x3859870, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:219
#3  0x00007f2877cd004a in QEventDispatcherUNIX::processEvents (this=0x21ce500, flags=...) at kernel/qeventdispatcher_unix.cpp:919
#4  0x00007f2877ca1882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f2877ca1abc in QEventLoop::exec (this=0x7f2860cb7db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f2877bb8924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007f2877c83c2f in QInotifyFileSystemWatcherEngine::run (this=0x356da40) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f2877bbb175 in QThreadPrivate::start (arg=0x356da40) at thread/qthread_unix.cpp:320
#9  0x00007f28722aed8c in start_thread (arg=0x7f2860cb8700) at pthread_create.c:304
#10 0x00007f287b8f504d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f285bfff700 (LWP 1292)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f287a7532a2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f287aa6c180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f287a7532d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f287aa7a254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f28722aed8c in start_thread (arg=0x7f285bfff700) at pthread_create.c:304
#4  0x00007f287b8f504d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f287c0a67a0 (LWP 1270)):
[KCrash Handler]
#6  intel_region_buffer (intel=0x2294d20, region=0x0, flag=2) at intel_regions.c:514
#7  0x00007f28637986c2 in intelClearWithBlit (ctx=0x2294d20, mask=2) at intel_blit.c:262
#8  0x00007f286379ad2a in intelClear (ctx=0x2294d20, mask=2) at intel_clear.c:177
#9  0x00007f287bc6bc47 in KWin::SceneOpenGL::paintBackground (this=<value optimized out>, region=<value optimized out>) at ../../kwin/scene_opengl.cpp:921
#10 0x00007f287bc637ef in KWin::Scene::paintGenericScreen (this=0x228b550, orig_mask=32) at ../../kwin/scene.cpp:188
#11 0x00007f287bc60bda in KWin::Scene::finalPaintScreen (this=0x228b550, mask=32, region=<value optimized out>, data=<value optimized out>) at ../../kwin/scene.cpp:178
#12 0x00007f287bc7ee79 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=32, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:173
#13 0x00007f2862856626 in KWin::StartupFeedbackEffect::paintScreen (this=0x35c13f0, mask=32, region=<value optimized out>, data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#14 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=32, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#15 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=32, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#16 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=32, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#17 0x00007f28627fd49d in KWin::LogoutEffect::paintScreen (this=0x357e3b0, mask=32, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:207
#18 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=32, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#19 0x00007f28628185cb in KWin::ShadowEffect::paintScreen (this=0x3429a60, mask=32, region=..., data=...) at ../../../kwin/effects/shadow/shadow.cpp:189
#20 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=32, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#21 0x00007f286282aeb8 in KWin::BlurEffect::paintScreen (this=<value optimized out>, mask=32, region=..., data=...) at ../../../kwin/effects/blur/blur.cpp:230
#22 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#23 0x00007f286280200d in KWin::PresentWindowsEffect::paintScreen (this=0x37dd100, mask=0, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:205
#24 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#25 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#26 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#27 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#28 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#29 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#30 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#31 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#32 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#33 0x00007f28627e9385 in KWin::DesktopGridEffect::paintScreen (this=<value optimized out>, mask=0, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:156
#34 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#35 0x00007f28627e2bad in KWin::BoxSwitchEffect::paintScreen (this=0x37c7ee0, mask=0, region=..., data=...) at ../../../kwin/effects/boxswitch/boxswitch.cpp:143
#36 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#37 0x00007f28628392c6 in KWin::CubeEffect::paintScreen (this=<value optimized out>, mask=0, region=..., data=...) at ../../../kwin/effects/cube/cube.cpp:698
#38 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#39 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#40 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#41 0x00007f2862843014 in KWin::CubeSlideEffect::paintScreen (this=<value optimized out>, mask=0, region=..., data=...) at ../../../kwin/effects/cube/cubeslide.cpp:111
#42 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#43 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#44 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#45 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#46 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#47 0x00007f2862831df6 in KWin::CoverSwitchEffect::paintScreen (this=0x35e9090, mask=0, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#48 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#49 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#50 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#51 0x00007f2879d3da18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#52 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#53 0x00007f28628283eb in KWin::ZoomEffect::paintScreen (this=0x35baba0, mask=0, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:341
#54 0x00007f287bc7ef03 in KWin::EffectsHandlerImpl::paintScreen (this=0x33b9570, mask=0, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#55 0x00007f287bc6300f in KWin::Scene::paintScreen (this=0x228b550, mask=0x7fff80c8e3ac, region=0x7fff80c8e470) at ../../kwin/scene.cpp:137
#56 0x00007f287bc76e53 in KWin::SceneOpenGL::paint (this=0x228b550, damage=..., toplevels=<value optimized out>) at ../../kwin/scene_opengl.cpp:772
#57 0x00007f287bc5e2f6 in KWin::Workspace::performCompositing (this=0x7f285c353c50) at ../../kwin/composite.cpp:448
#58 0x00007f2877cb61c9 in QObject::event (this=0x7f285c353c50, e=<value optimized out>) at kernel/qobject.cpp:1190
#59 0x00007f28770639e4 in QApplicationPrivate::notify_helper (this=0x21925a0, receiver=0x7f285c353c50, e=0x7fff80c8ec00) at kernel/qapplication.cpp:4462
#60 0x00007f28770683aa in QApplication::notify (this=<value optimized out>, receiver=0x7f285c353c50, e=0x7fff80c8ec00) at kernel/qapplication.cpp:4341
#61 0x00007f287b3f0716 in KApplication::notify (this=0x7fff80c8f000, receiver=0x7f285c353c50, event=0x7fff80c8ec00) at ../../kdeui/kernel/kapplication.cpp:311
#62 0x00007f2877ca249c in QCoreApplication::notifyInternal (this=0x7fff80c8f000, receiver=0x7f285c353c50, event=0x7fff80c8ec00) at kernel/qcoreapplication.cpp:731
#63 0x00007f2877ccff12 in sendEvent (this=0x2193940) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#64 QTimerInfoList::activateTimers (this=0x2193940) at kernel/qeventdispatcher_unix.cpp:604
#65 0x00007f2877cd005b in QEventDispatcherUNIX::processEvents (this=0x2137340, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#66 0x00007f287710bc0c in QEventDispatcherX11::processEvents (this=0x2137340, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#67 0x00007f2877ca1882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#68 0x00007f2877ca1abc in QEventLoop::exec (this=0x7fff80c8ef40, flags=...) at kernel/qeventloop.cpp:201
#69 0x00007f2877ca5ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#70 0x00007f287bbfc14c in kdemain (argc=<value optimized out>, argv=0x7fff80c8f698) at ../../kwin/main.cpp:542
#71 0x00007f287b82deff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=3, ubp_av=0x7fff80c8f698, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff80c8f688) at libc-start.c:226
#72 0x0000000000400669 in _start ()

Possible duplicates by query: bug 275525, bug 275478, bug 275202, bug 275176, bug 274967.

Reported using DrKonqi