23.0.50; vc-diff bombs with wrong-type-argument stringp

[Bill Wohler]

When I run `C-x v =' on a Subversion-controlled file, I get the appended
stack trace. I do not get this error with emacs -Q; however, the NEWS
file does not indicate any incompatible changes which would point out
which of my settings might be to blame.

If the problem is not apparent, please let me know and I'll try to find
the offending settings in my environment.

Debugger entered--Lisp error: (wrong-type-argument stringp 
("/home/wohler/.emacs"))
  call-process("svn" nil t nil "status" "-v" ("/home/wohler/.emacs"))
  apply(call-process "svn" nil t nil ("status" "-v" ("/home/wohler/.emacs")))
  (let ((status ...)) (goto-char (point-min)) (if (not ...) (if ... nil ...) 
(vc-svn-parse-status)))
  (save-excursion (set-buffer (get-buffer-create " *Subversion Output*")) 
(erase-buffer) (let (...) (goto-char ...) (if ... ... ...)))
  (vc-svn-with-output-buffer (let (...) (goto-char ...) (if ... ... ...)))
  vc-svn-run-status(("/home/wohler/.emacs"))
  (let* ((diff-switches-list ...) (status ...) (local ...) (changed ...) (rev1 
...) (rev-switches-list ...) (async ...)) (let (...) (if ... 1 0)))
  vc-svn-diff(("/home/wohler/.emacs"))
  apply(vc-svn-diff ("/home/wohler/.emacs"))
  vc-call-backend(SVN diff ("/home/wohler/.emacs"))
  byte-code("‰A@)ÃÄÅ\n!Æ\"!=ƒ‰AA)@address@hidden"‡ÉÅ\nC!Æ\nC#‡" [err x 
file indirect-function vc-find-backend-function vc-backend diff 4 signal 
vc-call-backend] 6)
  vc-default-workfile-unchanged-p(SVN "/home/wohler/.emacs")
  apply(vc-default-workfile-unchanged-p SVN "/home/wohler/.emacs")
  vc-call-backend(SVN workfile-unchanged-p "/home/wohler/.emacs")
  vc-workfile-unchanged-p("/home/wohler/.emacs")
  vc-diff(nil t)
  call-interactively(vc-diff)