Application: kwin (4.6.41 (4.7 >= 20110106) "release 2")
KDE Platform Version: 4.6.41 (4.7 >= 20110106) "release 2"
Qt Version: 4.7.1
Operating System: Linux 2.6.37-22-desktop x86_64
Distribution: "openSUSE 11.4 RC 1 (x86_64)"

-- Information about the crash:
kwin has crashed when clicking over a task in the taskbox applet

The crash can be reproduced some of the time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f02dc9bb760 (LWP 14249))]

Thread 2 (Thread 0x7f02c49a7700 (LWP 14276)):
#0  0x00007f02d826538c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f02db08f044 in ?? () from /usr/lib64/libQtScript.so.4
#2  0x00007f02db08f079 in ?? () from /usr/lib64/libQtScript.so.4
#3  0x00007f02d8260a3f in start_thread () from /lib64/libpthread.so.0
#4  0x00007f02dc23267d in clone () from /lib64/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f02dc9bb760 (LWP 14249)):
[KCrash Handler]
#6  0x00007f02c3691d3d in KWin::HighlightWindowEffect::prepareHighlighting (this=0xa5ff30) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/effects/highlightwindow/highlightwindow.cpp:243
#7  0x00007f02c36923df in KWin::HighlightWindowEffect::propertyNotify (this=0xa5ff30, w=0x7cef50, a=<value optimized out>) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/effects/highlightwindow/highlightwindow.cpp:173
#8  0x00007f02dc5ab33c in KWin::EffectsHandlerImpl::propertyNotify (this=0x7816c0, c=0x7cef50, atom=485) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/effects.cpp:471
#9  0x00007f02dc5463d9 in KWin::Client::propertyNotifyEvent (this=0x955e10, e=0x7fff8af39af0) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/events.cpp:845
#10 0x00007f02dc547ff6 in KWin::Client::windowEvent (this=0x955e10, e=0x7fff8af39af0) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/events.cpp:607
#11 0x00007f02dc54828e in KWin::Workspace::workspaceEvent (this=0x7335b0, e=0x7fff8af39af0) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/events.cpp:290
#12 0x00007f02dc525698 in KWin::Application::x11EventFilter (this=0x7fff8af39d90, e=0x7fff8af39af0) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/main.cpp:355
#13 0x00007f02d77f6cc5 in ?? () from /usr/lib64/libQtGui.so.4
#14 0x00007f02d7804ce0 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#15 0x00007f02d782dae4 in ?? () from /usr/lib64/libQtGui.so.4
#16 0x00007f02d85d8052 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#17 0x00007f02d85d8265 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#18 0x00007f02d85dc6ab in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#19 0x00007f02dc527b5a in kdemain (argc=<value optimized out>, argv=0x7fff8af39df0) at /usr/src/debug/kde-workspace-4.6.41_20110213/kwin/main.cpp:522
#20 0x00007f02dc17dbfd in __libc_start_main () from /lib64/libc.so.6
#21 0x0000000000400699 in _start () at ../sysdeps/x86_64/elf/start.S:113

Reported using DrKonqi