Rajeev Narang <rajeev@sivalik.com> writes:

Hi Rajeev,

> When rlogin-directory-tracking-mode is set to t, rlogin directory tracking fails.
>
> This is because (cd-absolute "/USER@HOST:") fails in emacs-26.  The same call succeeds in emacs-25.

rlogin.el still speaks about FTP access. This has worked until Emacs 25,
because ange-ftp.el and tramp.el have used the same file name
syntax. While ange.ftp.el uses ftp to access, Tramp has a variety of
connection methods. In case of absence, the default connection method is
used, often "ssh".

With Emacs 26, Tramp's file name syntax has changed. A method name is
mandatory now, at least "-" as indicator for the default method. The
obvious simple fix is