bug#28997: 27.0.50; Error in async shell-command process filter

[Eli Zaretskii]

> From: "Basil L. Contovounesios" <contovob@tcd.ie>
> Cc: <npostavs@users.sourceforge.net>, <28997@debbugs.gnu.org>
> Date: Thu, 02 Nov 2017 23:55:35 +0000
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > We try to fix bugs on the release branch, especially bugs in changes
> > introduced since the last release.
> 
> This bug was introduced in 85512e7521 "Allow async command
> output buffer to be shown only on output", which was first
> released with the current pretest 26.0.90.

Yes, I know.  And so we will want to fix it on the emacs-26 branch.  I
just tried to answer your question in a more general way than just
about this specific bug.