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

[Joseph Turner]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> 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

You are right.