bug#33414: 27.0.50; inhibit-changing-match-data can be t in syntax-propertize functions, breaking backtrace and looking-at

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> It's a variable we had since Emacs 23.  The proposed replacements are
> only useful if your Lisp program actually calls the APIs you propose
> to extend, but it won't do if you call higher-level APIs.

That's true, but the variable was only used a single place (in addition
to in looking-at-p and string-match-p) so it seems unlikely that anybody
is going to miss it.

So I've made it obsolete in Emacs 29.  We'll see whether anybody complains.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no