bug#69404: Loss of latex-mode fontification when loading libraries in latex-mode-hook that require json-mode

[Gabriele Nicolardi]

Indeed it was a bug in json-mode.el

https://github.com/json-emacs/json-mode/issues/79

Thanks!

Gabriele Nicolardi

Il 26/02/24 16:57, Eli Zaretskii ha scritto:
> > Date: Mon, 26 Feb 2024 16:41:15 +0100
> > Cc: 69404@debbugs.gnu.org
> > From: Gabriele Nicolardi <gabriele@medialab.sissa.it>
> >
> >
> > Il 26/02/24 14:03, Eli Zaretskii ha scritto:
> > > > If I load my .tex file like this:
> > > >
> > > > emacs -Q --eval "(load-file \"/tmp/config.el\")" test.tex
> > > >
> > > > I lose latex-mode fontification:
> > > What is the value of major-mode after you load your .tex file as
> > > above?
> > In the buffer loaded as above, with the wrong fontification, I have:
> >
> > major-mode is a variable defined in ‘C source code’.
> >
> >
> > Its value is ‘latex-mode’
> > Original value was ‘fundamental-mode’
> > Local in buffer test.tex; global value is fundamental-mode
> Then I suggest to look for the reason in json-mode.el.  For example,
> this part:
>
>    (add-to-list 'magic-fallback-mode-alist '("^[{[]$" . json-mode))
>
> could change the global state when you load json-mode.