Documentation error `tramp-default-method-alist'

[Michael Welsh Duggan]

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

The documentation for `tramp-default-method-alist' is:


  *Default method to use for specific user/host pairs.
  This is an alist of items (HOST USER METHOD).  The first matching item
  specifies the method to use for a file name which does not specify a
  method.  HOST and USER are regular expressions or nil, which is
  interpreted as a regular expression which always matches.  If no entry
  matches, the variable `tramp-default-method' takes effect.


However, specifying nil for host or user causes an error.

Steps to reproduce:

Evaluate: (add-to-alist 'tramp-default-method-alist '(nil "foo" "ssh"))
`C-x C-f /address@hidden:/ RET'

Evaluate: (add-to-alist 'tramp-default-method-alist '("somewhere" nil "ssh"))
`C-x C-f /address@hidden:/ RET'


In GNU Emacs 22.0.91.10 (i686-pc-linux-gnu, X toolkit)
 of 2006-12-17 on maru
X server distributor `The X.Org Foundation', version 11.0.70101000
configured using `configure '--without-toolkit-scroll-bars''

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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  display-time-mode: t
  shell-dirtrack-mode: t
  erc-autojoin-mode: t
  erc-button-mode: t
  erc-ring-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-match-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-netsplit-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
r <tab> <return> C-x k C-x C-f / s p r n <backspace> 
<backspace> e n s e r : <return> C-x C-f M-p ~ <return> 
C-p C-p C-e M-b M-b M-b M-b C-h v <return> C-e M-b 
M-b M-x t o g g l e - d e b <tab> e <tab> <return> 
C-x C-f M-p <return> q <switch-frame> <switch-frame> 
<switch-frame> <switch-frame> M-x l i s t - l o a d 
f <backspace> <tab> <return> C-x o C-s t r a m p C-a 
C-x 0 M-x r e p o r t - e m <tab> <return>

Recent messages:
Checking 270 files in /usr/local/share/emacs/22.0.91/lisp/gnus...
Checking 58 files in /usr/local/share/emacs/22.0.91/lisp/eshell...
Checking 68 files in /usr/local/share/emacs/22.0.91/lisp/erc...
Checking 52 files in /usr/local/share/emacs/22.0.91/lisp/emulation...
Checking 125 files in /usr/local/share/emacs/22.0.91/lisp/emacs-lisp...
Checking 54 files in /usr/local/share/emacs/22.0.91/lisp/calendar...
Checking 82 files in /usr/local/share/emacs/22.0.91/lisp/calc...
Checking 1 files in /usr/local/share/emacs/22.0.91/leim...
Mark saved where search started
Loading emacsbug...done

-- 
Michael Welsh Duggan
(address@hidden)