crash when using gnus

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Please write in English, because the XEmacs maintainers do not have
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In XEmacs 21.1 (patch 14) "Cuyahoga Valley" [Lucid] (i386-suse-linux, Mule) of Wed May 16 2001 on knuth
configured using `configure i386-suse-linux --with-gnu-make --with-gcc --dynamic --rel-alloc
--debug=no --error-checking=none --const-is-losing=no '--cflags=-O2 -m486 -mcpu=i486
-march=i486 -Wall -Wno-switch -pipe -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2'
--ldflags=-s --prefix=/usr --exec-prefix=/usr --bindir=/usr/X11R6/bin --datadir=/usr/share
--archlibdir=/usr/lib/xemacs/21.1.14/i386-suse-linux
--docdir=/usr/lib/xemacs/21.1.14/i386-suse-linux --lispdir=/usr/share/xemacs/21.1.14/lisp
--pkgdir=/usr/share/xemacs/21.1.14/lisp --etcdir=/usr/share/xemacs/21.1.14/etc
--statedir=/var/state/xemacs --lockdir=/var/state/xemacs/lock
--infodir=/usr/share/xemacs/info --mandir=/usr/share/man/man1 --with-sound=native
--with-database=gnudbm,berkdb --with-ncurses --with-tty=yes --with-gpm --with-site-lisp
--with-xpm --with-gif --with-tiff --with-jpeg --with-png --with-x --with-session=yes
--with-menubars=lucid --with-scrollbars=lucid --with-dialogs=athena3d --x-includes=/us!

 r/X11R6/include --x-libraries=/usr/X11R6/lib --with-mule --with-xim=xlib --with-xfs
--with-clash-detection --with-ldap --with-pop'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I was reading mail using gnus, A typed 'q' to og to the article list
buffer, and it crashed.

Lisp backtrace follows: