bug#31214: hang in Faccept_process_output

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Date: Thu, 19 Apr 2018 13:28:33 -0400
> 
> Glenn Morris wrote:
> 
> > Current master on RHEL7.4.
> 
> Also reproduced on current Debian testing.

If the emacs-26 branch doesn't have this problem, it could be due to
the changes in commit 4ba32858.  Can you try backing out that
changeset?

Thanks.