wrong-number-of-arguments when visiting RCS file

[Andrew M. Scott]

I see this error when visiting any file under RCS on today's (Jan 26) build.
This error did not occur on my yesterday's (Jan 25) build. I suspect it has 
something
to do with the recent vc/tramp edits mentioned in the Changelog.

% emacs -q
M-: (setq debug-on-error)
C-x C-f ~/memo/emacs.txt   [emacs.txt is under RCS control]

Debugger entered--Lisp error: (wrong-number-of-arguments #[(file) "=8c4        
\"=8c5==83,

  vc-user-login-name()
  vc-rcs-consult-headers("/eng/eng10/amscott1/memo/emacs.txt")
  vc-rcs-state-heuristic("/eng/eng10/amscott1/memo/emacs.txt")
  apply(vc-rcs-state-heuristic "/eng/eng10/amscott1/memo/emacs.txt")
  vc-call-backend(RCS state-heuristic "/eng/eng10/amscott1/memo/emacs.txt")
  vc-state("/eng/eng10/amscott1/memo/emacs.txt")
  vc-default-mode-line-string(RCS "/eng/eng10/amscott1/memo/emacs.txt")
  apply(vc-default-mode-line-string RCS "/eng/eng10/amscott1/memo/emacs.txt")
  vc-call-backend(RCS mode-line-string "/eng/eng10/amscott1/memo/emacs.txt")
  vc-mode-line("/eng/eng10/amscott1/memo/emacs.txt")
  vc-find-file-hook()
  run-hooks(find-file-hook)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer emacs.txt> "~/memo/emacs.txt" nil nil 
"/stor/garray/amscott1/memo/emacs.txt" (17761626 82))
  find-file-noselect("~/memo/emacs.txt" nil nil t)
  find-file("~/memo/emacs.txt" t)
  call-interactively(find-file)

In GNU Emacs 22.0.50.1 (x86_64-unknown-linux-gnu, X toolkit)
 of 2006-01-26 on chlr5836
X server distributor `The XFree86 Project, Inc', version 11.0.40201000
configured using `configure '--prefix=/stor/garray/linux_2.6.5_x86-64' 
'--x-includes=/usr/intel/pkgs/X11/R6.7.0-64/include' 
'--x-libraries=/usr/intel/pkgs/X11/R6.7.0-64/lib' 'CC=gcc' 'CFLAGS=-O2 
-I/usr/intel/pkgs/X11/R6.7.0-64/include -L/usr/intel/pkgs/X11/R6.7.0-64/lib 
-I/usr/intel/pkgs/zlib/1.2.1-64/include -L/usr/intel/pkgs/zlib/1.2.1-64/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/1.0.16rc1-64/include 
-L/usr/intel/pkgs/libpng/1.0.16rc1-64/lib -I/usr/intel/pkgs/jpeg/6b-64/include 
-L/usr/intel/pkgs/jpeg/6b-64/lib' 'LDFLAGS=-L/usr/intel/pkgs/X11/R6.7.0-64/lib 
-L/usr/intel/pkgs/zlib/1.2.1-64/lib -L/usr/intel/pkgs/ncurses/5.4/lib 
-L/usr/intel/pkgs/libungif/4.1.3/lib -L/usr/intel/pkgs/libpng/1.0.16rc1-64/lib 
-L/usr/intel/pkgs/jpeg/6b-64/lib 
-Wl,-rpath=/usr/intel/pkgs/X11/R6.7.0-64/lib:/usr/intel/pkgs/zlib/1.2.1-64/lib:/usr/intel/pkgs/ncurses/5.!
 
4/lib:/usr/intel/pkgs/libungif/4.1.3/lib:/usr/intel/pkgs/libpng/1.0.16rc1-64/lib:/usr/intel/pkgs/jpeg/6b-64/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.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Debugger

Minor modes in effect:
  tooltip-mode: t
  auto-compression-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  line-number-mode: t