(void-function vc-trunk-p) when visiting file under RCS and (setq vc-mistrust-permissions t)

[Andrew M. Scott]

Using a build of a 2005-05-18 Emacs CVS snapshot:

% emacs -q -no-site file

(setq vc-mistrust-permissions t)
(setq debug-on-error t)

C-x C-f ~/.Xdefaults

where ~/.Xdefaults has chmod 444 and is registered in a RCS subdirectory.

Debugger entered--Lisp error: (void-function vc-trunk-p)
  vc-trunk-p("1.1")
  vc-rcs-latest-on-branch-p("/eng/eng10/ascott/.Xdefaults" "1.1")
  vc-rcs-fetch-master-state("/eng/eng10/ascott/.Xdefaults" "1.1")
  vc-rcs-state("/eng/eng10/ascott/.Xdefaults")
  vc-rcs-state-heuristic("/eng/eng10/ascott/.Xdefaults")
  apply(vc-rcs-state-heuristic "/eng/eng10/ascott/.Xdefaults")
  vc-call-backend(RCS state-heuristic "/eng/eng10/ascott/.Xdefaults")
  vc-state("/eng/eng10/ascott/.Xdefaults")
  vc-default-mode-line-string(RCS "/eng/eng10/ascott/.Xdefaults")
  apply(vc-default-mode-line-string RCS "/eng/eng10/ascott/.Xdefaults")
  vc-call-backend(RCS mode-line-string "/eng/eng10/ascott/.Xdefaults")
  vc-mode-line("/eng/eng10/ascott/.Xdefaults")
  vc-find-file-hook()
  run-hooks(find-file-hook)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer .Xdefaults> "~/.Xdefaults" nil nil 
"~/.Xdefaults" (11491109 67))
  find-file-noselect("/eng/eng10/ascott/.Xdefaults" nil nil nil)
  find-file("/eng/eng10/ascott/.Xdefaults")
  dired-find-file()
  call-interactively(dired-find-file)

This error does *not* occur if using the default (setq vc-mistrust-permissions 
nil)

In GNU Emacs 22.0.50.1 (i686-pc-linux-gnu, X toolkit)
 of 2005-05-18 on chlr4917
Distributor `The XFree86 Project, Inc', version 11.0.40300000
configured using `configure '--prefix=/stor/garray/linux' 
'--x-includes=/usr/intel/pkgs/X11/R6.7.0/include' 
'--x-libraries=/usr/intel/pkgs/X11/R6.7.0/lib' 'CC=gcc' 'CFLAGS=-O2 
-I/usr/intel/pkgs/X11/R6.7.0/include -L/usr/intel/pkgs/X11/R6.7.0/lib 
-I/usr/intel/pkgs/zlib/1.2.1/include -L/usr/intel/pkgs/zlib/1.2.1/lib  
-I/usr/intel/pkgs/ncurses/5.4/include -L/usr/intel/pkgs/ncurses/5.4/lib 
-I/usr/intel/pkgs/libungif/4.1.3/include -L/usr/intel/pkgs/libungif/4.1.3/lib 
-I/usr/intel/pkgs/libpng/1.0.16rc1/include 
-L/usr/intel/pkgs/libpng/1.0.16rc1/lib -I/usr/intel/pkgs/jpeg/6b/include 
-L/usr/intel/pkgs/jpeg/6b/lib' 'LDFLAGS=-L/usr/intel/pkgs/X11/R6.7.0/lib 
-L/usr/intel/pkgs/zlib/1.2.1/lib -L/usr/intel/pkgs/ncurses/5.4/lib 
-L/usr/intel/pkgs/libungif/4.1.3/lib -L/usr/intel/pkgs/libpng/1.0.16rc1/lib 
-L/usr/intel/pkgs/jpeg/6b/lib 
-Wl,-rpath=/usr/intel/pkgs/X11/R6.7.0/lib:/usr/intel/pkgs/zlib/1.2.1/lib:/usr/intel/pkgs/ncurses/5.4/lib:/usr/intel/pkgs/libungif/4.1.3/lib:/usr/intel/pkgs/libp!
 ng/1.0.16rc1/lib:/usr/intel/pkgs/jpeg/6b/lib''

Important settings:
  value of $LC_ALL: en_US
  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: C
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Major mode: Conf[Xdefaults]

Minor modes in effect:
  tool-bar-mode: t
  mouse-wheel-mode: t
  tooltip-mode: t
  auto-compression-mode: t
  menu-bar-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  line-number-mode: t
  next-error-follow-minor-mode:  Fol