From: Eli Zaretskii <eliz@gnu.org>
To: Joseph Turner <joseph@breatheoutbreathe.in>
Cc: 60643@debbugs.gnu.org
Subject: bug#60643: 29.0.50; set-buffer-major-mode resets buffer local variables
Date: Sun, 08 Jan 2023 08:00:11 +0200 [thread overview]
Message-ID: <83ilhhr2fo.fsf@gnu.org> (raw)
In-Reply-To: <87eds5r5d4.fsf@breatheoutbreathe.in> (bug-gnu-emacs@gnu.org)
> Date: Sat, 07 Jan 2023 20:48:54 -0800
> From: Joseph Turner via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> It appears that set-buffer-major-mode resets buffer local variables.
>
> To reproduce with `emacs -Q`:
>
> (defvar-local test-var nil)
> (setq test-var t)
> (message "%s" test-var) ;; t
> ;; (set-auto-mode)
> (set-buffer-major-mode (current-buffer))
> (message "%s" test-var) ;; nil
>
> Is this behavior expected?
Yes, I think so. Changing the major mode kills all buffer-local
variables. If you don't want some variable to be killed, give it the
permanent-local property.
next prev parent reply other threads:[~2023-01-08 6:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-08 4:48 bug#60643: 29.0.50; set-buffer-major-mode resets buffer local variables Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-08 5:45 ` Ruijie Yu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-08 6:00 ` Eli Zaretskii [this message]
2023-01-08 9:09 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-01-08 9:09 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
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