GNU bug report logs - #46374
28.0.50; Ask me to save buffers only if they are under callers dir

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From: Juri Linkov <juri <at> linkov.net>
To: Hauke Rehfeld <hauke <at> haukerehfeld.de>
Cc: 46374 <at> debbugs.gnu.org, Stefan Monnier <monnier <at> iro.umontreal.ca>, Tino Calancha <tino.calancha <at> gmail.com>
Subject: bug#46374: Regression: erronous calls to PRED switch major-mode of unrelated modified buffers
Date: Tue, 31 Aug 2021 10:02:42 +0300

> I'm way not deep enough into this issue, but how about using a
> temp buffer and checking for major mode equivalent (can pred ever
> reasonably be fundamental-mode?):

This assumes that only derived-mode-p can be used as the predicate,
so it will fix only this particular case until some other code
will find a more clever way to circumvent this assumption
by returning some other arbitrary function that does
more nasty things than changing the major mode.

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