bug#57003: 28.1.90; Can local variables be loaded before loading major mode?

[Phil Sainty]

On 2022-08-07 02:00, Visuwesh wrote:
> Correct me if I'm wrong, this is about the major-mode definition
> clearing the buffer's local variables before turning on the major-mode,
> right?

To elaborate, every major mode calls `kill-all-local-variables',
and this is pretty much the first thing that happens (although
`change-major-mode-hook' runs before the local variables are
actually clobbered).

https://stackoverflow.com/a/19295380/324105 (specifically the
"Derived modes, and mode hooks" section) might be a useful write-up
if you want to get your head around the sequence of events.

Note that variables which are marked as permanent-local will
retain their values.  Refer to:

M-x elisp-index-search RET kill-all-local-variables


-Phil