Michael Heerdegen via "Bug reports for GNU Emacs, the Swiss army knife
of text editors" <bug-gnu-emacs@gnu.org> writes:

> > (1) What do we need to do we do when `dired-directory' is a cons
> > (i.e. dir along with a file list)?

Here is an update of the former patch doing the minimum in that case:
update only the car of a consp `dired-directory' when the car is
affected by the renaming, and leave the rest untouched: