GNU bug report logs - #23272
25.0.92; syntax-propertize-via-font-lock considered harmful

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 23272 <at> debbugs.gnu.org
Subject: bug#23272: 25.0.92; syntax-propertize-via-font-lock considered harmful
Date: Thu, 21 Nov 2019 13:34:14 +0100

Dmitry Gutov <dgutov <at> yandex.ru> writes:

> Since Emacs 26 (where the bug still reproduces), ada-mode has both
> switched to a proper syntax-propertize-function instead of the one 
> mentioned above and moved out of Emacs core, so "mode: ada" isn't
> doing anything in 'emacs -Q'.
>
> So the repro scenario is like this now:
>
> (define-derived-mode foo-mode fundamental-mode "Foo"
>   (setq-local syntax-propertize-function
> 	      (syntax-propertize-via-font-lock nil)))
>
> (with-temp-buffer
>   (insert "-- -*- mode: foo -*-")
>   (delay-mode-hooks
>     (set-auto-mode))
>   (syntax-propertize (point)))

Ah; thanks for the explanation.

> Considering font-lock-syntactic-keywords are obsolete since Emacs 24,
> this is not very important, and people should feel free to close this
> if a fix is not found soon.

OK; I'll leave it open for now, but probably closing this in a month or
so if nothing further happens.

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

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