From: Noam Postavsky <npostavs@gmail.com>
To: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Cc: , 39823@debbugs.gnu.org
Subject: bug#39823: 26.3; update-directory-autoloads regression from Emacs 26 to Emacs 27
Date: Thu, 12 Mar 2020 20:43:09 -0400 [thread overview]
Message-ID: <87o8t16q5e.fsf@gmail.com> (raw)
In-Reply-To: <87zhd2lpad.fsf@gmail.com> (Maxim Cournoyer's message of "Fri, 28 Feb 2020 10:11:54 -0500")
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Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:
> After passing from Emacs 26 to Emacs 27, the following snippet of code
> doesn't behave the same:
>
> emacs --quick --batch --eval "(progn
> ;(require 'autoload)
> (let ((backup-inhibited t)
> (generated-autoload-file \"/tmp/toto\"))
> (update-directory-autoloads \"/tmp\")))"
>
>
> Works on Emacs 26.3, but fails on Emacs 27.0.50, with the error message:
>
> Wrong type argument: stringp, nil
The difference is that --eval now evaluates with lexical-binding
enabled, so the let-binding of generated-autoload-file is lexical unless
autoload.el, with its (defvar generated-autoload-file nil ...), has been
loaded. Another way to demonstrate this:
emacs -Q --batch -l bug-39823-autoload-regression.el
fails with the same error, with bug-39823-autoload-regression.el as the
attached file in both Emacs 26 and 27. Remove the lexical-binding
setting, and it succeeds in both.
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;;; -*- lexical-binding: t -*-
(progn
;(require 'autoload)
(let ((backup-inhibited t)
(generated-autoload-file "/tmp/toto"))
(update-directory-autoloads "/tmp")))
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See also https://lists.gnu.org/r/emacs-devel/2020-03/msg00173.html for
(much) more discussion on this.
next prev parent reply other threads:[~2020-03-13 0:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 15:11 bug#39823: 26.3; update-directory-autoloads regression from Emacs 26 to Emacs 27 Maxim Cournoyer
2020-03-13 0:43 ` Noam Postavsky [this message]
2020-03-13 8:30 ` Eli Zaretskii
2020-03-14 2:06 ` Maxim Cournoyer
2020-03-13 23:01 ` Michael Heerdegen
2020-03-14 2:03 ` Maxim Cournoyer
2020-03-17 11:48 ` Noam Postavsky
2020-03-14 3:34 ` Richard Stallman
2020-03-17 2:16 ` Maxim Cournoyer
2020-03-19 1:46 ` Richard Stallman
2020-04-08 3:55 ` Maxim Cournoyer
2020-04-08 6:31 ` Eli Zaretskii
2020-04-08 16:41 ` Maxim Cournoyer
2020-04-08 19:09 ` Eli Zaretskii
2020-04-19 3:13 ` Maxim Cournoyer
2020-04-19 12:19 ` Noam Postavsky
2020-06-22 4:10 ` Maxim Cournoyer
2020-06-22 15:07 ` Noam Postavsky
2020-06-23 20:42 ` Maxim Cournoyer
2020-09-30 15:23 ` Lars Ingebrigtsen
2020-10-01 17:20 ` Lars Ingebrigtsen
2020-10-01 17:54 ` Eli Zaretskii
2020-10-01 18:06 ` Lars Ingebrigtsen
2020-10-02 2:36 ` Lars Ingebrigtsen
2020-10-02 17:54 ` Maxim Cournoyer
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