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bug#18555: 24.4.50; butlast and nbutlast doesn't handle improper lists
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From: |
Andreas Schwab |
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Subject: |
bug#18555: 24.4.50; butlast and nbutlast doesn't handle improper lists |
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Date: |
Thu, 25 Sep 2014 09:21:50 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
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.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."