bug#71106: dired-do-compress should check before attempting to read directories

[Dan Jacobson <jidanni@jidanni.org>]

On Wed, May 22, 2024 at 04:00:23PM +0300, Eli Zaretskii wrote:
> I cannot reproduce this.  I get: "Compress or uncompress: 1 file."
> instead.

Please do the following (this time "guaranteed"!) experiment,
bash -ex <<"EOF"
cd /tmp
p=plss00p020 n=nt00064
touch $p.{shp,dbf,shx,txt}
tar -czf ${p}_${n}.tar.gz $p.*
tar tzvf ${p}_${n}.tar.gz
EOF
emacs -Q /tmp

Now hit spacebar until the cursor is upon plss00p020_nt00064.tar.gz
and hit Z then y .

Not only will you get the error message, the line showing plss00p020_nt00064.tar.gz
also has been temporarily abducted, and needs you to hit "g" to be seen again!