bug#41489: `package-dir-info' fails on a directory with a non-saved file

[Eli Zaretskii]

> From: Paul Pogonyshev <pogonyshev@gmail.com>
> Date: Sat, 23 May 2020 19:50:02 +0200
> 
> - edit any Elisp file, but don't save it;
> - open its directory in Dired;
> - evaluate `(package-dir-info)'.
> 
> Fails with: (file-missing "Opening input file" "No such file or directory" 
> ".../.#blabla.el")

In what version of Emacs is that?  Please always supply the
information collected by report-emacs-bug, as that saves unnecessary
questions such as this one.

Thanks.