Application: kwin (4.6.1 (4.6.1))
KDE Platform Version: 4.6.1 (4.6.1)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-7-generic x86_64
Distribution: Ubuntu Natty (development branch)

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

i had this crash when i'm using present window effect......

The crash does not seem to be reproducible.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f157e59e7c0 (LWP 1996))]

Thread 3 (Thread 0x7f155d4d9700 (LWP 2002)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f155d4d8af0 in ?? ()
#2  0x00007fff97dff7b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f155ccd8700 (LWP 2003)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f157cc392d2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f157cf52180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f157cc39309 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f157cf60254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f157b635373 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#4  0x00007f157470ed8c in start_thread (arg=0x7f155ccd8700) at pthread_create.c:304
#5  0x00007f157ddd8f7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f157e59e7c0 (LWP 1996)):
[KCrash Handler]
#6  KWin::CloseWindowView::hide (this=0x0) at ../../../kwin/effects/presentwindows/presentwindows.cpp:2096
#7  0x00007f155f95511c in KWin::PresentWindowsEffect::setHighlightedWindow (this=0x1c051b0, w=0x0) at ../../../kwin/effects/presentwindows/presentwindows.cpp:1776
#8  0x00007f155f960da3 in KWin::PresentWindowsEffect::windowClosed (this=0x1c051b0, w=0x1ae7160) at ../../../kwin/effects/presentwindows/presentwindows.cpp:424
#9  0x00007f157e174327 in KWin::EffectsHandlerImpl::windowClosed (this=<value optimized out>, c=0x1ae7160) at ../../kwin/effects.cpp:322
#10 0x00007f157e0e3cbd in KWin::Client::releaseWindow (this=0xf09b70, on_shutdown=false) at ../../kwin/client.cpp:238
#11 0x00007f157e111bc9 in KWin::Client::windowEvent (this=0xf09b70, e=0x7fff97da25f0) at ../../kwin/events.cpp:655
#12 0x00007f157e112848 in KWin::Workspace::workspaceEvent (this=0xcca5c0, e=0x7fff97da25f0) at ../../kwin/events.cpp:323
#13 0x00007f157e0ee9c8 in KWin::Application::x11EventFilter (this=0x7fff97da2830, e=0x7fff97da25f0) at ../../kwin/main.cpp:367
#14 0x00007f157952aa65 in qt_x11EventFilter (ev=0x7fff97da25f0) at kernel/qapplication_x11.cpp:440
#15 0x00007f157953b610 in QApplication::x11ProcessEvent (this=0x7fff97da2830, event=0x7fff97da25f0) at kernel/qapplication_x11.cpp:3390
#16 0x00007f1579564b34 in QEventDispatcherX11::processEvents (this=0xc91340, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#17 0x00007f157a0fa882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#18 0x00007f157a0faabc in QEventLoop::exec (this=0x7fff97da2770, flags=...) at kernel/qeventloop.cpp:201
#19 0x00007f157a0feecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#20 0x00007f157e0f0ffc in kdemain (argc=<value optimized out>, argv=0x7fff97da2ec8) at ../../kwin/main.cpp:542
#21 0x00007f157dd11eff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fff97da2ec8, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff97da2eb8) at libc-start.c:226
#22 0x0000000000400669 in _start ()

Possible duplicates by query: bug 266364.

Reported using DrKonqi