bug#53739: 28.0.91; "C-x d" fails when "emacs -Q" starts on NetBSD with plan9/bin on head of PATH

[Eli Zaretskii]

> Date: Sat, 5 Feb 2022 09:04:29 +0000 (UTC)
> From: Van Ly <van.ly@sdf.org>
> cc: luangruo@yahoo.com, 53739@debbugs.gnu.org
> 
> On Sat, 5 Feb 2022, Eli Zaretskii wrote:
> 
> >> In the case of Plan9's ls what is needed is to leave out the "-a" switch.
> >
> > Which means "C-u C-x d" should fix your use case nicely.  You can also
> > customize dired-listing-switches in your init file, if you intend to
> > use this version of 'ls' routinely.  It's a defcustom for this very
> > reason.
> >
> > Bottom line: I think we can close this bug with no further action.
> >
> 
> Thanks.
> 
> Another fix is to re-order Emacs's exec-path and put plan9/bin second 
> last at the bottom.  Emacs could DWIM to the exec-path on seeing 
> plan9/bin at the top.

I see no need to change Emacs for such a corner use case that already
has an easy solution.