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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Subversion of user chosen major mode by Emacs. [Was: My usage of
 imenu is broken.]
Date: Wed, 29 May 2024 15:41:45 +0300
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In-Reply-To: <ZlcOnAs_E2qn5NDi@ACM> (message from Alan Mackenzie on Wed, 29
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> Date: Wed, 29 May 2024 11:16:44 +0000
> Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> As I said, when I did M-x revert-buffer yesterday, Emacs changed my
> major mode from C Mode to c-ts-mode.  This is clearly unacceptable.

Please show a minimal recipe, starting from "emacs -Q", where
reverting a buffer changes from c-mode to c-ts-mode.

As a general rule, revert-buffer does not guarantee the major mode
will remain the same, not by default.  It calls normal-mode, so if
anything has changed in automatic determination of the mode, you will
get a different mode.  This is by design.