bug#29165: 26.0.90; can't use some code byte-compiled under emacs 24

[Noam Postavsky]

reopen 29165
quit

Glenn Morris <rgm@gnu.org> writes:

> Noam Postavsky wrote:
>
>> Pushed to emacs-26.
>>
>> [1: e7b1111]: 2017-12-13 17:31:27 -0500
>>   Mention new strictness for &optional, &rest in arglists (Bug#29165)
>>   
>> https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=e7b1111155b3116d0c7b137e0e1d312db0f1ca80
>
> When attempting to merge emacs-26 to master, this conflicts with
>
> commit cea0bca54f
> Date:   Mon Nov 27 12:45:16 2017 -0500
>
>     * lisp/emacs-lisp/cl-macs.el: Fix &key with no key arg
>
> Please could someone indicate how this is to be resolved.

I've reverted my cl-lib code changes, so the conflict should be resolved
now.  As for this bug, it seems the best way forward is to relax the
checks so that an empty list of &optional variables is accepted.