Re: `message' not outputting the newline "atomically"

[Paul Eggert]

Andreas Schwab wrote:
> On Jun 21 2019, Paul Eggert <address@hidden> wrote:
>
> > it'll mess up formatting for the next stderr diagnostic, and (c) POSIX
> > allows platforms to line-buffer stderr by default and Emacs has been
> > working on such platforms for ages anyway.
>
> How do you know?

Trivially, by using a recent Emacs master on GNU/Linux, as this uses 
line-buffered stderr. It works fine.