Character display and compose region.

[lawrence mitchell]

When using compose-region to "prettify" lambda's in lisp code to
look like actual lambdas, I run into an odd display buglet.

Basically, the incorrect character is displayed, despite the
fact that the fontset I use has an actual lambda character.

instead of (make-char 'greek-iso8859-7 107), I see
(make-char 'greek-iso8859-7 59).

Minimal test case:

emacs -q --no-site-file

(font-lock-add-keywords
 'lisp-interaction-mode
 `(("\\<lambda\\>"
    (0 (progn (compose-region (match-beginning 0)
                              (match-end 0)
                              ,(make-char 'greek-iso8859-7 107))
              nil)))))

(font-lock-mode 1)

(insert "\n(lambda () nil)"
        "\n"(make-char 'greek-iso8859-7 107)
        "\n"(make-char 'greek-iso8859-7 59))


The results I see can be seen in a screenshot at:
<URL: http://www.vegetable.demon.co.uk/wence/lambda.png>

I can also mail this should people need it.

In GNU Emacs 21.3.50.1 (i386-mingw-nt5.0.2195)
 of 2003-03-17 on YAM
configured using `configure --with-gcc (3.2)'

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: eng
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

-- 
lawrence mitchell <address@hidden>