Subject: Re: bug#62333: 30.0.50; Issue with tree-sitter syntax tree during certain changes

From: Eli Zaretskii <[email-masked]>
Date: Tue, 28 Mar 2023 15:11:31 +0300

> Date: Tue, 28 Mar 2023 11:39:13 +0000
> From: Gregory Heytings <[email-masked]>
> cc: [email-masked], [email-masked], [email-masked], 
>     [email-masked]
> 
> 
> >> which will work, independently of the A-B narrowing set by the user, 
> >> and will reset the narrowing to A-B upon return.
> >
> > It will only work if [C..D] is inside [A..B].  It will not work if a 
> > Lisp program wants to widen [A..B], i.e. if [C..D] is larger than 
> > [A..B].
> >
> 
> Hmmm... no, it will work for any values of [C..D]: (widen) is equivalent 
> to (narrow-to-region 1 (1+ (buffer-size))), and in general the bounds 
> given to 'narrow-to-region' are not limited by the current narrowing.

with-restriction signals an error if you call it wit a region that is
outside of the current restriction.  At least it does here.