next-line dumps core

[Hiroshi Fujishima]

Symptoms:

Executing following procedures dumps core.

% cat x.el
(with-temp-buffer
  (insert-file-contents (expand-file-name "NEWS" data-directory))
  (next-line))
% emacs --batch -l x.el
Fatal error (11)zsh: segmentation fault (core dumped)  emacs --batch -l x.el

In GNU Emacs 21.3.50.1 (sparc-sun-solaris2.9, X toolkit, Xaw3d scroll bars)
 of 2005-01-22 on alex
configured using `configure '--prefix=/usr/local/emacs' 
'--x-includes=/usr/local/include' '--x-libraries=/usr/local/lib' 
'--without-xim' 'CC=ccache gcc''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ja
  locale-coding-system: japanese-iso-8bit
  default-enable-multibyte-characters: t

Major mode: Summary

Minor modes in effect:
  iswitchb-mode: t
  show-paren-mode: t
  encoded-kbd-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
RET RET RET RET RET RET RET RET RET RET RET RET RET 
RET RET RET RET RET RET RET RET RET RET RET RET RET 
RET RET RET RET RET RET RET RET RET RET RET RET RET 
RET RET RET RET RET RET RET RET RET RET RET RET RET 
RET RET RET RET RET RET RET RET RET RET RET RET RET 
RET RET RET RET g ESC x e p DEL DEL r e p o TAB r TAB 
e DEL RET RET C-x k RET ESC x r e p o TAB r TAB RE
T

Recent messages:
Loading gnus-async...done
Loading ansi-color...done
Loading smiley...done
Loading gnus-cite...done
Loading vc-cvs...done
Parsing BBDB... (frobnicating...done)
End of message [16 times]
Making completion list...
Loading emacsbug...done
Making completion list...