bug#8703: truncated unicode glyphs in X11

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 19 May 2011 22:17:02 +0200
> From: Bertram Felgenhauer <bertram.felgenhauer@googlemail.com>
> 
> I have tracked down the regression using git-bisect, and found it
> was introduced by
> 
> http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=5d747e944fd5a15bb36f865efc214024803c5fcf

For those using bzr, this is revision 100011 on the emacs-23 branch or
revision 99634.13.1 on the trunk.  Perhaps Handa-san could take a look
at this, as he made that change.

> Undoing a single change restores the correct behaviour for me:
> 
> diff --git a/src/xdisp.c b/src/xdisp.c
> index 3c9d385..20365ff 100644
> --- a/src/xdisp.c
> +++ b/src/xdisp.c
> @@ -5926,8 +5926,7 @@ get_next_display_element (struct it *it)
>                            : STRINGP (it->string) ? IT_STRING_CHARPOS (*it)
>                            : IT_CHARPOS (*it));
>  
> -         it->face_id = FACE_FOR_CHAR (it->f, face, it->char_to_display, pos,
> -                                      it->string);
> +         it->face_id = FACE_FOR_CHAR (it->f, face, it->c, pos, it->string);

Can you tell what are the values of it->c and it->char_to_display at
this point, for one of the characters hose display is truncated?