Re: `looking-back' strange warning

[Tassilo Horn]

Andreas Röhler <andreas.roehler@easy-emacs.de> writes:

> M-x `byte-compile-file' warns:
>
> ... Warning: looking-back called with 1 argument, but
>     requires 2-3
>
> While its definition:
>
> (defun looking-back (regexp &optional limit greedy)
>
> Docu bug?

No, its definition contains

  (declare
   (advertised-calling-convention (regexp limit &optional greedy) "25.1"))

and that's what creates the warnings.  You can still use it without
LIMIT but you should not.  This probably means that in Emacs 33, LIMIT
will become a mandatory argument.

Bye,
Tassilo