reftex-toc fails with RCS buffers

[Roland Winkler]

Symptoms:


When I visit an older RCS version of a LaTeX file using
vc-version-other-window, reftex-toc fails in these buffers. 
It produces an empty table of contents.

I do not know whether this should be called a bug or a missing
feature. If this behavior is due to the fact that no file is
associated with the buffers created by vc-version-other-window, then
maybe the command reftex-toc could be disabled in the menu bar of
these buffers.




In GNU Emacs 21.3.50.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2005-01-13 on tfkp07
Distributor `The XFree86 Project, Inc', version 11.0.40300001
configured using `configure '--prefix=/nfs/common' 
'--libexecdir=/nfs/common/lib' 
'--bindir=/nfs/common/lib/emacs/21.1/bin/i686-Linux' 
'--mandir=/nfs/common/share/man' '--infodir=/nfs/common/share/info' 
'--with-gcc' '--with-pop' '--with-x' '--with-x-toolkit=athena' 
'--x-libraries=/usr/X11R6/lib''

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: en_US
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  auto-compression-mode: t
  show-paren-mode: t
  display-time-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: 1
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <menu-bar> <help-menu> 
<report-emacs-bug>

Recent messages:
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