bug#29345: 27.0.50; Error message for cl-destructuring-bind could be improved

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Philipp Stephani <p.stephani2@gmail.com> writes:
>
>> $ emacs -Q -batch -l cl-lib -eval '(cl-destructuring-bind (a b) (list 1))'
>> Wrong number of arguments: nil, 1
>>
>> It would be nice if the first error data item weren't nil, but
>> e.g. `(cl-destructuring-bind (a b))` so that the error is obvious.
>
> What about
>
> Wrong number of arguments: (a b), 1
>
> The following patch achieves that, but since it was explicitly 'cl-none
> before (which is the magic value that gives you nil in that error
> message), I'm not sure whether this has any negative effects?  Probably
> not, because there's this:
>
> (defvar cl--bind-block) ;Name of surrounding block, only use for `signal' 
> data.
>
> Any opinions?

There weren't any, so I'm applying the patch.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no