bug#53590: 28.0.91; icompletion-vertical-mode gets stuck on 'M-x man RET awk'

[Eli Zaretskii]

> Date: Fri, 28 Jan 2022 14:53:16 +0000 (UTC)
> From: Van Ly <van.ly@sdf.org>
> cc: 53590@debbugs.gnu.org
> 
> > I cannot reproduce this: it works for me as expected.  Are you sure
> > "M-x man" on your system is capable of completion in the default
> > completion mode in "emacs -Q"?  If not, maybe your man-db database is
> > missing or outdated?
> >
> 
> On NetBSD the output from apropos is different in format to the one 
> on GNU/Linux.  Could that be why the behavior is stuck?

Could be, but why are you looking at "apropos"?  AFAIU, man.el uses
"man -k", and there are various attempts to adapt to some systems, see
Man-man-k-use-anchor.  Maybe NetBSD needs to be handled like kfreebsd?