M-x woman signals error when no current word

[Kalle Olavi Niemitalo]

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

Start Emacs with "emacs -nw -q --no-site-file".
Type C-x h C-w to clear the *scratch* buffer.
Type M-x woman RET.
An error is signalled: "Wrong type argument: stringp, nil"

Backtrace:
Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  completing-read("Manual entry: " (("411toppm" (0)) ("822-date" (0)) ("CA.pl" 
(0)) ("GET" (0)) ("HEAD" (0)) ("ImageMagick" (0)) ("Mail" (0)) ("POST" (0)) 
("Xprt" (0)) ("[" (0)) ("a2p" (0)) ("aclocal-1.4" (0)) ("aclocal-1.7" (0)) 
("aclocal" (0)) ("acpi_available" (0)) ("addr2line" (0)) ("aid" (0)) ("animate" 
(0)) ("anytopnm" (0)) ("apm_available" (0)) ("apropos" (0)) 
("apt-extracttemplates" (0)) ("apt-ftparchive" (0)) ("apt-sortpkgs" (0)) ("ar" 
(0)) ("arch" (0)) ("as" (0)) ("asciitopgm" (0)) ("asn1parse" (0)) ("at" (0)) 
("atktopbm" (0)) ("atq" (0)) ("atrm" (0)) ("audiofile-config" (0)) ("aumix" 
(0)) ("autoconf" (0)) ("autoconf2.13" (0)) ("autoheader" (0)) ("autoheader2.13" 
(0)) ("autom4te" (0)) ("automake-1.4" (0)) ("automake-1.7" (0)) ("automake" 
(0)) ("autopoint" (0)) ("autoreconf" (0)) ("autoreconf2.13" (0)) ("autoscan" 
(0)) ("autoscan2.13" (0)) ("autoupdate" (0)) ("autoupdate2.13" (0)) ...) nil 1 
(nil . 0) woman-topic-history)
  woman-file-name(nil nil)
  woman(nil nil)
* call-interactively(woman)
  execute-extended-command(nil)
  call-interactively(execute-extended-command)

The fault is in the INITIAL-INPUT parameter of completing-read,
which is here set as (nil . 0).  The nil comes from
(current-word), which was changed in revision 1.614 of simple.el
(on 2003-07-07) to return nil rather than "" when it can't find
a word.

In GNU Emacs 21.3.50.10 (i386-pc-linux-gnu, GTK+ Version 2.2.2)
 of 2003-09-06 on Astalo
configured using `configure '--prefix=/home/kalle' 
'--exec-prefix=/home/kalle/i386-pc-linux-gnu' '--host=i386-pc-linux-gnu' 
'--build=i386-pc-linux-gnu' '--enable-maintainer-mode' '--with-x-toolkit=gtk' 
'CFLAGS=-O2 -g -Wall -W' 'CPPFLAGS=-I/home/kalle/include' 
'LDFLAGS=-L/home/kalle/i386-pc-linux-gnu/lib' 'build_alias=i386-pc-linux-gnu' 
'host_alias=i386-pc-linux-gnu''

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: address@hidden
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Recent input:
C-x h C-w ESC x w o m a n RET ESC x r e p o r t SPC 
e m a c s SPC b u g RET

Recent messages:
For information about the GNU Project and its goals, type C-h C-p.
Mark set [2 times]
Loading woman...
Loading easymenu...done
Loading advice...done
Loading woman...done
Building list of manual directory expansions...
Building completion list of all manual topics...
woman-file-name: Wrong type argument: stringp, nil
Loading emacsbug...done