Version:           3.0.0b2 (using KDE 3.1.94 (3.2 Beta 2), SuSE)
Compiler:          gcc version 3.3.1 (SuSE Linux)
OS:          Linux (i686) release 2.4.21-144-athlon

sorry, no further information how it happened, just the backtrace:

[New Thread 16384 (LWP 4070)]
[New Thread 32769 (LWP 4085)]
[New Thread 16386 (LWP 4086)]
0x41a56006 in waitpid () from /lib/libpthread.so.0
#0  0x41a56006 in waitpid () from /lib/libpthread.so.0
#1  0x40efeba2 in KCrash::defaultCrashHandler(int) (sig=11) at kcrash.cpp:246
#2  0x41a54bb1 in __pthread_sighandler () from /lib/libpthread.so.0
#3  <signal handler called>
#4  0x42e49d9c in QComboView::setCurrentActiveItem(QListViewItem*) (
    this=0x8a0b0a0, item=0x97fca70) at qcomboview.cpp:1492
#5  0x42e1745d in ClassViewPart::removeFile(QString const&) (this=0x8a0ae10, 
    fileName=@0xbfffec10) at classviewpart.cpp:714
#6  0x42e18790 in ClassViewPart::qt_invoke(int, QUObject*) (this=0x8a0ae10, 
    _id=8, _o=0xbfffecf0) at classviewpart.moc:159
#7  0x4133bdc8 in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#8  0x4133c36a in QObject::activate_signal(int, QString) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#9  0x406b68ea in KDevLanguageSupport::aboutToRemoveSourceInfo(QString const&)
    (this=0x690072, t0=@0x690072) at kdevlanguagesupport.moc:103
#10 0x429deb62 in CppSupportPart::removeWithReferences(QString const&) (
    this=0x83ec130, fileName=@0xbfffecf0) at cppsupportpart.cpp:1288
#11 0x429e0a76 in CppSupportPart::recomputeCodeModel(QString const&) (
    this=0x83ec130, fileName=@0xbfffeed0) at cppsupportpart.cpp:1488
#12 0x429d825b in CppSupportPart::customEvent(QCustomEvent*) (this=0x83ec130, 
    ev=0x9d3f4b0) at cppsupportpart.cpp:286
#13 0x4133979c in QObject::event(QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#14 0x412da906 in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#15 0x412d9c2e in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0x40e90503 in KApplication::notify(QObject*, QEvent*) (this=0xbffff4d0, 
    receiver=0x83ec130, event=0x9d3f4b0) at kapplication.cpp:511
#17 0x412db821 in QApplication::sendPostedEvents(QObject*, int) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#18 0x412db5a6 in QApplication::sendPostedEvents() ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#19 0x412810ad in QEventLoop::processEvents(unsigned) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0x412eec50 in QEventLoop::enterLoop() ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#21 0x412eeb46 in QEventLoop::exec() () from /usr/lib/qt3/lib/libqt-mt.so.3
#22 0x412dab9f in QApplication::exec() () from /usr/lib/qt3/lib/libqt-mt.so.3
#23 0x080663e9 in main (argc=6881394, argv=0x690072) at main.cpp:128