Stefan Monnier [2022-10-15 19:31 -0400] wrote:

>>> Hmmm looks like we forgot to mark the `testfn` arg obsolete here with
>>> `advertised-calling-convention` like we did for `map-elt`.
>>> Could you fix that oversight in your patch while you're at it?
>>
>> Sure, but generic functions don't play well with
>> advertised-calling-convention: each subsequent cl-defmethod overwrites
>> the preceding symbol-function, so any existing entry in
>> advertised-signature-table is no longer found after that.
>
> Good point.  Not a reason not to add an `advertised-calling-convention`,

Updated patch attached.

> but indeed we should fix that.  Could you make a bug report for that?

Done: https://bugs.gnu.org/58563.

Thanks,

-- 
Basil