Version:           4.2.4 (using KDE 4.2.4)
Compiler:          gcc-4.3.3 
OS:                Linux
Installed from:    Gentoo Packages

Surf to http://funcall.blogspot.com/2009/04/some-lisp-machine-minutia.html and press back button:

Application: Konqueror (konqueror), signal SIGSEGV
0x00007f61a7df1451 in nanosleep () from /lib/libc.so.6
Current language:  auto; currently c
[Current thread is 0 (LWP 5899)]

Thread 2 (Thread 0x7f619a426910 (LWP 5903)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:220
#1  0x00007f61aa71a777 in QWaitCondition::wait (this=0x770198, mutex=0x770190, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  0x00007f61aa711a29 in QThreadPoolThread::run (this=0x7709d0) at concurrent/qthreadpool.cpp:140
#3  0x00007f61aa719a14 in QThreadPrivate::start (arg=0x7709d0) at thread/qthread_unix.cpp:188
#4  0x00007f61aa4a92e7 in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f61a7e2238d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f61ad18e750 (LWP 5899)):
[KCrash Handler]
#5  0x00007f61aa75576b in QString::operator== (this=<value optimized out>, other=@0xcded18) at tools/qstring.cpp:1912
#6  0x00007f619cb65fcd in KHTMLPart::restoreState (this=0xbb7730, stream=<value optimized out>) at /usr/include/qt4/QtCore/qstring.h:400
#7  0x00007f61acd15bb0 in KonqView::restoreHistory (this=0xbb9560) at /var/tmp/portage/kde-base/konqueror-4.2.4/work/konqueror-4.2.4/konqueror/src/konqview.cpp:871
#8  0x00007f61acd6356a in KonqMainWindow::slotGoHistoryDelayed (this=0x7713c0) at /var/tmp/portage/kde-base/konqueror-4.2.4/work/konqueror-4.2.4/konqueror/src/konqmainwindow.cpp:2845
#9  0x00007f61acd6cf05 in KonqMainWindow::qt_metacall (this=0x7713c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb51d7e80)
    at /var/tmp/portage/kde-base/konqueror-4.2.4/work/konqueror-4.2.4_build/konqueror/src/konqmainwindow.moc:438
#10 0x00007f61aa7ffdfd in QMetaObject::activate (sender=0x2110180, from_signal_index=<value optimized out>, to_signal_index=4, argv=0xe) at kernel/qobject.cpp:3101
#11 0x00007f61aa8062bf in QSingleShotTimer::timerEvent (this=0x2110180) at kernel/qtimer.cpp:298
#12 0x00007f61aa7fc693 in QObject::event (this=0x2110180, e=0xcded18) at kernel/qobject.cpp:1066
#13 0x00007f61a9b69c2d in QApplicationPrivate::notify_helper (this=0x622460, receiver=0x2110180, e=0x7fffb51d8540) at kernel/qapplication.cpp:4056
#14 0x00007f61a9b7165a in QApplication::notify (this=0x7fffb51d8a60, receiver=0x2110180, e=0x7fffb51d8540) at kernel/qapplication.cpp:4021
#15 0x00007f61ab5eff1b in KApplication::notify (this=0x7fffb51d8a60, receiver=0x2110180, event=0x7fffb51d8540)
    at /var/tmp/portage/kde-base/kdelibs-4.2.4-r3/work/kdelibs-4.2.4/kdeui/kernel/kapplication.cpp:307
#16 0x00007f61aa7edcfb in QCoreApplication::notifyInternal (this=0x7fffb51d8a60, receiver=0x2110180, event=0x7fffb51d8540) at kernel/qcoreapplication.cpp:606
#17 0x00007f61aa815f5e in QTimerInfoList::activateTimers (this=0x6261a0) at kernel/qcoreapplication.h:213
#18 0x00007f61aa812f3d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#19 0x00007f61a6528e29 in IA__g_main_context_dispatch (context=0x625120) at gmain.c:1814
#20 0x00007f61a652c498 in g_main_context_iterate (context=0x625120, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2445
#21 0x00007f61a652c65c in IA__g_main_context_iteration (context=0x625120, may_block=1) at gmain.c:2508
#22 0x00007f61aa812e9f in QEventDispatcherGlib::processEvents (this=0x60e3a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#23 0x00007f61a9bf00cf in QGuiEventDispatcherGlib::processEvents (this=0x227a170, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#24 0x00007f61aa7ec6a2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1256355920}) at kernel/qeventloop.cpp:149
#25 0x00007f61aa7ec83c in QEventLoop::exec (this=0x7fffb51d87f0, flags={i = -1256355840}) at kernel/qeventloop.cpp:197
#26 0x00007f61aa7ee8dc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#27 0x00007f61acd90c37 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /var/tmp/portage/kde-base/konqueror-4.2.4/work/konqueror-4.2.4/konqueror/src/konqmain.cpp:257
#28 0x00007f61a7d6ea26 in __libc_start_main (main=0x4009c0 <main>, argc=2, ubp_av=0x7fffb51d94d8, init=0x4009f0 <__libc_csu_init>, fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fffb51d94c8) at libc-start.c:220
#29 0x00000000004008f9 in _start ()
Current language:  auto; currently asm
#0  0x00007f61a7df1451 in nanosleep () from /lib/libc.so.6
Current language:  auto; currently c