bug#48711: Crashes in lisp_string_width

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Cc: 48711@debbugs.gnu.org
> Date: Fri, 28 May 2021 11:39:46 +0300
> 
> This is the shortest test case:
> 
>   (require 'char-fold)
>   (setq char-fold-symmetric t)
>   (char-fold-update-table)
> 
> and your latest change 3fe2f482bd fixed it,
> so this can be closed.

Thanks.  The fix notwithstanding, the test case is very useful, and it
already allowed me to find one more bug there, which was exposed by
adding support for automatic compositions.  Now fixed.

> BTW, now compilation highlights this line
> 
>   Pure-hashed: 15274 strings, 3028 vectors, 41734 conses, 2570 bytecodes, 254 
> others
> 
> using red error face.  Does this mean that something needs to be fixed?

You mean, this is a result of the string-width changes?