utf-8 input under X11

[David Monniaux]

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In GNU Emacs 21.1.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2001-10-22 on picsou.chatons
configured using `configure  --with-xpm --with-jpeg --with-tiff --with-gif 
--with-png --with-xim --with-x --with-x-toolkit=lucid --prefix=/opt/emacs-21'
Important settings:
  value of $LC_ALL: fr_FR.UTF-8
  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: fr_FR.UTF-8
  locale-coding-system: nil
  default-enable-multibyte-characters: t

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

Under X11, running with an UTF-8 encoded keyboard :
I of course use
(set-terminal-coding-system 'utf-8)

The key combinations AltGr-E or Multi_key (Compose) E =, both of which
produce a Euro sign (character 8364 in Unicode), make Emacs dump core.

The key combinations Multi_key O E and Multi_key o e, producing
respectively OE and oe ligatures (Unicode 338 and 339), produce
respectively the following error messages :
encoded-kbd-self-insert-ccl: Invalid character: 0140000, 49152, 0xc000
encoded-kbd-self-insert-ccl: Invalid character: 0200000, 65536, 0x10000

I add that all these key combinations work in X11 applications willing
to run in UTF-8 locales (KWord, for instance).

The accented characters such as e acute or o circumflex work perfectly
in Emacs under this setup, so the UTF-8 keyboard decoding must work at
least partially.

Also, the following commands work fine :
(defun oe () "Insert oe ligature" (interactive) (insert-char (ucs-to-char 339) 
1))
(defun OE () "Insert OE ligature" (interactive) (insert-char (ucs-to-char 338) 
1))
(defun eur () "Insert Euro sign" (interactive) (insert-char (ucs-to-char 8364) 
1))
The characters get displayed and saved properly.

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <help-menu> <report-emacs-bug>

Recent messages:
Loading encoded-kb...done
Loading font-lock...
Loading regexp-opt...done
Loading font-lock...done
Loading advice...done
Loading cus-edit...
Loading easymenu...done
Loading cus-edit...done
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...done