Re: [External] : Undefined behavior for the function ‘last’ or an error?

[tpeplt <tpeplt@gmail.com>]

Drew Adams <drew.adams@oracle.com> writes:

>> > IMO this should be fixed.  Someone(TM) will
>> > maybe say it's intentional (but then it
>> > should be doc'd).
>> 
>> Also, if it is intentional, then it should be documented why it is
>> inconsistent with how the related functions ‘butlast’ and ‘nbutlast’
>> behave so that users do not expect those two functions to accept
>> non-lists as an argument.
>> 
>> Also, checking a few other list functions, ‘nthcdr’, ‘take’, and
>> ‘ntake’, there is a similar inconsistent result that might be
>> intentional or not.  The behavior of ‘nthcdr’ is unexpected, while the
>> behavior of ‘take’ and ‘ntake’ are unpredictable because these are
>> Emacs-Lisp-specific functions.
>
> I suggest you do: `M-x report-emacs-bug'.
> Thanks for uncovering this.

Thanks for the response.  I will wait a day to see if anyone can point
to something I have missed.  If no one does, then I will report the
problem.

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