> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Wed, 18 Sep 2019 05:23:20 -0700
> Cc: Richard Copley <rcopley@gmail.com>, martin rudalics <rudalics@gmx.at>,
>  emacs-devel <emacs-devel@gnu.org>
>
> >    ELC      ../lisp/replace.elc
> > Can't find D:\Devel\emacs\repo\trunk\src\bootstrap-emacs.exe to refresh
> > preloaded Lisp files
>
> Thanks, I installed the attached to try to fix that.

It can't.  The problem is that openp expects file_directory_p to
return ENOTDIR for a file that exists, but is not a directory.  This
kludge was never documented, and so the DOS_NT implementation didn't
support it.  That totally confused the logic in openp.