Eli Zaretskii <eliz@gnu.org> writes:

>> there is a possibility it prevents correct decoding in case the
>> terminal receives a utf-8 character in single byte chunks (though
>> I'm not sure if it's even valid for a program to emit single bytes
>> like that).
>
> I agree.

I thought of limiting partial to 4, to avoid this possibility, since
utf-8 characters can be 4 bytes at most (not sure about other encodings
though).