Subject: Re: bug#65797: 29.0.92; func-arity should not return (0 . many) with apply-partially

From: Stefan Monnier <[email-masked]>
Date: Fri, 08 Sep 2023 13:18:55 -0400

> IIUC, the patch breaks code that passes a CONDITION predicate that accepts
> only one argument and also passes an ARG argument.
>
> Is there another case which would break?

Yes, it also breaks the reverse: when you don't pass ARG but the
function needs 2 arguments.

        Stefan