From: Michael Albinus <michael.albinus@gmx.de>
To: Drew Adams <drew.adams@oracle.com>
Cc: 31558@debbugs.gnu.org
Subject: bug#31558: 27.0; `custom-file' settings messed up by Emacs 27
Date: Wed, 23 May 2018 11:07:16 +0200 [thread overview]
Message-ID: <87wovug2pn.fsf@gmx.de> (raw)
In-Reply-To: <5cd8f30c-a341-40c9-bb1f-441425e1a160@default> (Drew Adams's message of "Tue, 22 May 2018 12:04:04 -0700 (PDT)")
Drew Adams <drew.adams@oracle.com> writes:
Hi Drew,
> Admittedly, this is probably not a problem that others will run into
> often. But it is quite annoying for me.
>
> I think the problem was introduced in Emacs 27, but I'm not positive.
I suspect it is also in Emacs 26.1, see below.
> This is the problem:
>
> If I update a user option and then save the new value, it is saved to my
> `custom-file', as usual. But thereafter my `custom-file' cannot be
> loaded by Emacs 20, because of these two entries that have been updated:
>
> '(tramp-default-method "ftp" nil (tramp))
> '(tramp-verbose 9 nil (tramp))
In Tramp 2.3 (integrated in Emacs 26.1), the defcustoms have changed:
--8<---------------cut here---------------start------------->8---
(defcustom tramp-default-method
...
:group 'tramp
:type 'string
:require 'tramp) ;; new in Tramp 2.3.
--8<---------------cut here---------------end--------------->8---
The additional arguments are due to the ":require 'tramp", which was
added that time.
> But why must Emacs now add that "nil (tramp)" to my custom settings?
> Must defining the option value require the library?
IIRC, there was a reason for this. Don't remember the details :-(
> Should Emacs (e.g. 27) be doing that systematically? If it should, then
> what's the best way for me to prevent it from doing that, for my use
> case?
Maybe you put at the beginning of your custom file
--8<---------------cut here---------------start------------->8---
;; This is for Emacs < 22
(or (locate-library "tramp")
(provide 'tramp))
--8<---------------cut here---------------end--------------->8---
Best regards, Michael.
next prev parent reply other threads:[~2018-05-23 9:07 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 19:04 bug#31558: 27.0; `custom-file' settings messed up by Emacs 27 Drew Adams
2018-05-23 9:07 ` Michael Albinus [this message]
2018-05-23 14:07 ` Drew Adams
2018-05-23 14:50 ` Michael Albinus
2018-05-23 15:47 ` Drew Adams
2018-05-23 18:05 ` Michael Albinus
2018-05-23 18:15 ` Drew Adams
2018-05-23 18:22 ` Michael Albinus
2018-05-23 19:17 ` Drew Adams
2018-05-24 12:43 ` Michael Albinus
2018-05-24 13:47 ` Drew Adams
2018-05-24 13:56 ` Michael Albinus
2018-05-24 14:44 ` Drew Adams
2018-05-24 14:59 ` Michael Albinus
2018-05-24 15:03 ` Drew Adams
2018-05-29 8:11 ` Michael Albinus
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