From: Alan Mackenzie <acm@muc.de>
To: Eli Zaretskii <eliz@gnu.org>
Cc: larsi@gnus.org, AC <achirvasub@gmail.com>, 43037@debbugs.gnu.org
Subject: bug#43037: Eval error in the ‘c-lang-defvar’ or ‘c-lang-setvar’
Date: Fri, 16 Oct 2020 14:43:53 +0000 [thread overview]
Message-ID: <20201016144353.GA7085@ACM> (raw)
In-Reply-To: <834kmuwisx.fsf@gnu.org>
Hello, Eli and AC.
On Fri, Oct 16, 2020 at 13:45:34 +0300, Eli Zaretskii wrote:
> > Date: Fri, 16 Oct 2020 06:14:17 -0400
> > From: AC <achirvasub@gmail.com>
> > Cc: 43037@debbugs.gnu.org
> > Literally seconds ago I compiled emacs-27, started it up with 'emacs
> > -Q' and then visited the blank file '~/new.js'. That error popped
> > up.
> I cannot reproduce this with stock Emacs 27.1, but I can reproduce
> with the current emacs-27 branch. The more detailed error message is
> this:
> Eval error in the ‘c-lang-defvar’ or ‘c-lang-setvar’ for
> ‘font-lock-comment-end-skip’ (fallback source eval - js-mode
> compiled with CC Mode 5.34 but loaded with 5.34.1): (error
> "‘c-font-lock-comment-end-skip’ got no (prior) value in js-mode
> (might be a cyclic reference)")
> Alan, can you take a look, please?
Yes, I think the problem is precisely what the error message said.
js-mode.el was compiled (quite a long time ago) when c-version was still
5.34, but since then c-version has become 5.34.1. So their is a clash
between what js-mode.el was compiled with and the CC Mode current in the
Emacs version.
To resolve this, I think deleting lisp/progmodes/js-mode.elc and
compiling lisp/progmodes/js-mode.el again should sort out the problem.
This problem has happened more than once. I think the solution should
be in the Makefile to add a dependency of js-mode.elc on cc-defs.el.
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2020-10-16 14:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 12:37 bug#43037: Eval error in the ‘c-lang-defvar’ or ‘c-lang-setvar’ AC
2020-10-16 8:29 ` Lars Ingebrigtsen
2020-10-16 10:14 ` AC
2020-10-16 10:45 ` Eli Zaretskii
2020-10-16 13:35 ` AC
2020-10-16 14:43 ` Alan Mackenzie [this message]
2020-10-16 15:38 ` AC
2020-10-16 16:04 ` Alan Mackenzie
2020-10-16 16:08 ` AC
2020-10-16 20:04 ` Alan Mackenzie
2020-10-16 15:45 ` Eli Zaretskii
2020-10-16 16:32 ` Alan Mackenzie
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