bug#61235: 30.0.50; tree-sit: `treesit-node-check' lacks a way to tell if a node belongs to a deleted parser

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Mon, 6 Feb 2023 19:00:30 -0800
> Cc: Mickey Petersen <mickey@masteringemacs.org>,
>  61235@debbugs.gnu.org
> 
> > Yuan, any reason not to extend treesit-node-check instead?
> 
> I did extend treesit-node-check in the patch. But I also added a function 
> treesit-parser-live-p, which makes the same check but directly on a parser. 
> It just made sense to me that if we let treesit-node-check check the nodes’ 
> parser’s status, we’d also add a function to allow directly checking the 
> status of a parser.

That additional function would signal an error in the case discussed
here, so I'm not sure we should add it in that shape, or at all.  Why
isn't treesit-node-check enough?