Re: unused lexical variable in `cl-loop'

[Emanuel Berg <incal@dataswamp.org>]

Felix Dietrich wrote:

>   (cl-block nil
>     (let*
>         ((i min)
>          (--cl-var-- max)
>          (num nil)
>          (num nil))
>       (while
>           (<= i --cl-var--)
>         (setq num
>               (nconc num
>                      (list i)))
>         (setq i
>               (+ i 1)))
>       num))
>
> The variable ‘num’ is bound twice

That's right, if you bind the same lexical/static variable
more than once you get the "Unused lexical variable" warning
for every occasion and it doesn't matter if it's used or not.

(let ((one 1)  
      (one 1) )
  one)

;; Warning: Unused lexical variable `one'
;; Warning: Unused lexical variable `one'

But if you do this ...

(let ((one 1)
      (one 2) )
  one)

You only get a warning for the first one ...

;; Warning: Unused lexical variable `one'

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