bug#29918: 26.0.90; serial-term error in process filter

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Stefan Monnier <monnier@iro.umontreal.ca>,  npostavs@gmail.com,
>   29918@debbugs.gnu.org,  gazally@runbox.com
> Date: Sun, 21 Jul 2019 16:45:33 +0200
> 
> >> > I don't understand why limit, if we assume that no program will write
> >> > UTF-8 encoded sequences byte-byte.
> >> 
> >> I don't think we can assume that, in general.
> >
> > What would be a situation where it is false?
> 
> Isn't sending bytes one-by-one a pretty common thing for (primitive)
> programs to do?  I'd assume so, especially for serial communication
> programs.

We are talking about term.el, don't we?  So the programs relevant here
are those which run in a terminal, whether serial or not, and they are
generally expected to talk in characters, not bytes.