GNU bug report logs - #76472
nconc should fail for dotted lists

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Package: emacs;

Reported by: Pip Cet <pipcet <at> protonmail.com>

Date: Fri, 21 Feb 2025 14:16:02 UTC

Severity: normal

Done: Pip Cet <pipcet <at> protonmail.com>

Bug is archived. No further changes may be made.

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Message #13 received at 76472-done <at> debbugs.gnu.org (full text, mbox):

From: Pip Cet <pipcet <at> protonmail.com>
To: Mattias Engdegård <mattias.engdegard <at> gmail.com>
Cc: 76472-done <at> debbugs.gnu.org
Subject: Re: bug#76472: nconc should fail for dotted lists
Date: Fri, 21 Feb 2025 18:03:19 +0000

Mattias Engdegård <mattias.engdegard <at> gmail.com> writes:

>> The current behavior is: (nconc '(1 . 2) '(3 4)) => (1 3 4)
>
> Actually that is probably intended and completely fine. It's what
> Common Lisp defines for this operation, and I don't think adding a nil
> check would be an improvement.

Sorry for the noise, closing.

Pip
This bug report was last modified 140 days ago.

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