bug#48925: [PATCH] Set `minibuffer-completion-*` variables buffer-locally in a few more places

[Lars Ingebrigtsen <larsi@gnus.org>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> This follows up on changes proposed in bug#45474.
>
> Thanks, the first patch looks good to me (assuming it works ;-).

So I've now applied it to Emacs 29.  It didn't lead to any obvious
regressions (or test suite failures) that I can see, which is a good
sign.

>> The second patch is a bit more controversial, but is probably required
>> if we want more reliable usage of completion commands in non-innermost
>> minibuffers (that is, with minibuffer-follows-selected-frame set
>> to nil.)
>
> The patch is fundamentally right, but as you say it's a bit more
> controversial because it risks exposing bugs.  Hmm...
>
> To be on the safer side, I guess we could replace the
>
>     specbind (Qminibuffer_completion_table, Qnil);
>
> with a use of `minibuffer-with-setup-hook` that sets the var to nil in
> the new minibuffer.  But doing it in C is awkward so it would best be
> done by moving the function to subr.el.

Sounds like a good idea to me.  Miha, could you do that?

-- 
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   bloggy blog: http://lars.ingebrigtsen.no