Rich,

on Tue, 6 Jun 2023 10:19:19 -0400 you (Rich Felker <dalias@libc.org>)
wrote:

> In that case I would probably lean towards asking AG to instead make a
> change to (CX shaded) "it is unspecified whether a single zero byte is
> written or the conversion has no output" and not imposing a change on
> potentially unaware C implementations that have nothing to do with
> POSIX, nor imposing a requirement to conflict with ISO C.
> 

yes that's what they are proposing as a fallback alternative:

    …, except that if the `wint_t` argument is a null wide character
    it is unspecified whether it is converted to no bytes or to a null
    byte.

> I really doubt there is anyone who cares about the specific behavior
> in this case, but it seems unprofessional to do something like this
> last-minute.

indeed

> "Future directions" notes could be added that this might change.

maybe


Thanks
Jₑₙₛ

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