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From: "M. Ian Graham" <hello@miangraham.com>
To: Tassilo Horn <thorn@fastmail.fm>
Cc: "55149@debbugs.gnu.org" <55149@debbugs.gnu.org>,
	"monnier@iro.umontreal.ca" <monnier@iro.umontreal.ca>
Subject: bug#55149: 29.0.50; Commit f30625943e broke magit/with-editor
Date: Thu, 28 Apr 2022 06:56:19 +0000	[thread overview]
Message-ID: <wWP5hZNmph0OV54AULdMqeeiC56RV1gSnYNeUMkBisZfCIwuyd9S5h1sPgG7XqdOf3F4PFrTB2EHFSRrfLIwYYRjbyi-v76-nl3Ky1PZFhk=@miangraham.com> (raw)
In-Reply-To: <87o80lhg9b.fsf@fastmail.fm>

> Oh, well, the recipe can even be simplyfied to defining just a
> do-nothing advice!

Ah ha. Return value shenanigans. Here's a no-server test case.

--- begin elisp ---
(advice-add 'original :after
            #'original--advice)

(defun original () "correct: original return value passes through")
(defun original--advice () "broken: advice function's return value is used")

(message (original))
--- end elisp ---

Output before f30625943e:
$ emacs -Q --script bug-recipe.el
correct: original return value passes through

Output after f30625943e:
$ emacs -Q --script bug-recipe.el
broken: advice function's return value is used

-Ian






  reply	other threads:[~2022-04-28  6:56 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-28  5:15 bug#55161: 29.0.50; [PATCH] oclosure transcription error redux dick
2022-04-28 10:23 ` bug#55149: " Lars Ingebrigtsen
2022-04-27 12:48   ` bug#55149: 29.0.50; Commit f30625943e broke magit/with-editor Tassilo Horn
2022-04-27 19:41     ` No Wayman
2022-04-27 21:48       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-28  3:39         ` Tassilo Horn
2022-04-28  4:02           ` No Wayman
2022-04-28  6:58         ` Juri Linkov
2022-04-28  7:12           ` Tassilo Horn
2022-04-28  7:22             ` Juri Linkov
2022-04-28  7:31               ` Tassilo Horn
2022-04-28 13:39           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-28 14:14             ` Tassilo Horn
2022-04-28 14:28               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-28 14:39                 ` Tassilo Horn
2022-04-28  2:06     ` bug#55149: (No Subject) M. Ian Graham
2022-04-28  4:06     ` bug#55149: 29.0.50; Commit f30625943e broke magit/with-editor M. Ian Graham
2022-04-28  4:47       ` Tassilo Horn
2022-04-28  6:12         ` M. Ian Graham
2022-04-28  6:28           ` Tassilo Horn
2022-04-28  6:56             ` M. Ian Graham [this message]
2022-04-28 13:50     ` bug#55149: bug#55161: 29.0.50; [PATCH] oclosure transcription error redux Rudolf Schlatte
2022-04-28 13:28   ` dick
2022-04-28 13:42   ` bug#55149: " Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-28 15:26     ` bug#55161: bug#55149: 29.0.50; Commit f30625943e broke magit/with-editor Jonas Bernoulli
2022-04-28 16:32       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-28 22:49         ` Jonas Bernoulli
2022-04-28 23:44           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors

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