GNU bug report logs - #74215
(when 1) evaluates to 1 on latest master

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Brennan Vincent" <brennan <at> umanwizard.com>
To: bug-gnu-emacs <at> gnu.org
Subject: (when 1) evaluates to 1 on latest master
Date: Tue, 05 Nov 2024 12:59:43 -0500

(when 1) evaluates to 1, rather than nil, on latest master. This is
contrary to the documentation, which reads:

When COND yields non-nil, eval BODY forms sequentially and return
value of last one, or nil if there are none.

According to some discussion on IRC (thanks thuna`), this seems to have
been introduced here:

https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=7c63b632e4e

Message #8 received at 74215 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: "Brennan Vincent" <brennan <at> umanwizard.com>,
 Mattias Engdegård <mattiase <at> acm.org>
Cc: 74215 <at> debbugs.gnu.org
Subject: Re: bug#74215: (when 1) evaluates to 1 on latest master
Date: Tue, 05 Nov 2024 21:12:20 +0200

> From: "Brennan Vincent" <brennan <at> umanwizard.com>
> Date: Tue, 05 Nov 2024 12:59:43 -0500
> 
> (when 1) evaluates to 1, rather than nil, on latest master. This is
> contrary to the documentation, which reads:
> 
> When COND yields non-nil, eval BODY forms sequentially and return
> value of last one, or nil if there are none.
> 
> According to some discussion on IRC (thanks thuna`), this seems to have
> been introduced here:
> 
> https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=7c63b632e4e

Thanks.  Emacs 30 also shows this behavior, but Emacs 29 doesn't.

Mattias, could you please take a look?

Message #13 received at 74215-done <at> debbugs.gnu.org (full text, mbox):

From: Mattias Engdegård <mattias.engdegard <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Brennan Vincent <brennan <at> umanwizard.com>, 74215-done <at> debbugs.gnu.org
Subject: Re: bug#74215: (when 1) evaluates to 1 on latest master
Date: Wed, 6 Nov 2024 13:49:12 +0100

>> (when 1) evaluates to 1, rather than nil

Very sorry about that; now fixed. Thank you for reporting it!

(I haven't had much Emacs time lately and am clearly building up a backlog but this was clearly my fault and quickly remedied.)

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