From: Stefan Kangas <stefan@marxist.se>
To: Andreas Schwab <schwab@suse.de>
Cc: 18555@debbugs.gnu.org, Leo Liu <sdl.web@gmail.com>
Subject: bug#18555: 24.4.50; butlast and nbutlast doesn't handle improper lists
Date: Mon, 30 Sep 2019 04:39:27 +0200 [thread overview]
Message-ID: <CADwFkm=F1rvntkRh-hLL8eZvEOLey_g=hyWvoQhybdQP2UYs_Q@mail.gmail.com> (raw)
In-Reply-To: <m3ppeke44i.fsf@gmail.com>
tags 18555 + notabug wontfix
close 18555
quit
Andreas Schwab <schwab@suse.de> writes:
> Leo Liu <sdl.web@gmail.com> writes:
>
>> (nbutlast '(1 2 . 3))
>>
>> throws an error due to `length' which can be fixed
>> by using safe-length instead.
>>
>> (butlast '(1 2 . 3))
>>
>> still throws an error due to copy-sequence not taking
>> improper list.
>>
>> What is the right thing to do?
>
> Don't do that then.
Agreed. Both butlast and nbutlast are documented to work on lists, and
throwing a malformed list at them should correctly signal an error.
I'm therefore closing this bug report.
Best regards,
Stefan Kangas
prev parent reply other threads:[~2019-09-30 2:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-25 4:05 bug#18555: 24.4.50; butlast and nbutlast doesn't handle improper lists Leo Liu
2014-09-25 7:21 ` Andreas Schwab
2019-09-30 2:39 ` Stefan Kangas [this message]
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