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

[Eli Zaretskii]

> Date: Mon, 27 Mar 2023 08:24:42 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: Eli Zaretskii <eliz@gnu.org>, wkirschbaum@gmail.com, casouri@gmail.com, 
>     62333@debbugs.gnu.org
> 
> >> Which is a fragile, semi-broken means, as we all know.
> >
> > What is a broken mess, is user-level narrowing. And how the downstream 
> > code can never guess the purpose the narrowing was applied for.
> 
> Note that this is what labeled narrowings attempts to solve.

Labeled narrowing cannot solve this because it does nothing to
alleviate the problems with user-defined narrowing.  So if the user
narrows the buffer, we cannot do anything to safely widen in the
general case, and labeled narrowing cannot help us.