bug#46374: Regression: erronous calls to PRED switch major-mode of unrelated modified buffers

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Thu, 06 Jan 2022 21:09:47 +0200
> Cc: 46374@debbugs.gnu.org, Hauke Rehfeld <hauke@haukerehfeld.de>,
>  Tino Calancha <tino.calancha@gmail.com>
> 
> > It's actually easy to distinguish this specific case: when the pred is
> > passed directly to `save-some-buffers` we don't need to do the "call
> > PRED to get the actual predicate" dance, since the caller could just as
> > well do that dance before calling us if that's what they want.
> >
> > IOW, the test for `save-some-buffers-function` is only needed for those
> > functions that come from `save-some-buffers-default-predicate`.
> >
> > Any objection to the patch below (which also aligns the code closer
> > with the doc since the doc of `save-some-buffers` doesn't mention the
> > use of the `save-some-buffers-function` property on its `pred`
> > argument).
> 
> Then this change needs to be in the release branch, so users won't start
> relying on the unintended case of using of the `save-some-buffers-function`
> property on the `pred` argument.

I don't see the message to which you are responding, so I cannot tell
whether the patch you have in mind is appropriate for the release
branch.