crash trying to read article in gnus () in 21.4.14 with some mods.

Fatal error.

Your files have been auto-saved.
Use `M-x recover-session' to recover them.

Your version of XEmacs was distributed with a PROBLEMS file that  may describe
your crash, and with luck a workaround.  Please check it first, but do report
the crash anyway.  Please report this bug by invoking M-x report-emacs-bug,
or by selecting `Send Bug Report' from the Help menu.  If necessary, send
ordinary email to `crashes@xemacs.org'.  *MAKE SURE* to include the XEmacs
configuration from M-x describe-installation, or equivalently the file
Installation in the top of the build tree.

Lisp backtrace follows:

  split-window(#<window on " *nntpd*" 0x48a9c> 9 nil)
  # bind (sub size comp-subs rest new-win result s window-min-height window-min-
width total len subs type current-window window split)
  gnus-configure-frame((cond (gnus-use-trees (quote ...)) (t (quote ...))))
  # bind (gnus-window-frame-focus split all-visible force setting)
  gnus-configure-windows(article)
  # bind (article article-window endp stop circular lines)
  gnus-summary-next-page(nil)
  # bind (command-debug-status)
  call-interactively(gnus-summary-next-page)
  # (condition-case ... . error)
  # (catch top-level ...)