bug#10102: emacs 24 read-file-name bug?

[Glenn Morris]

Lachlan Deck wrote:

> In emacs 24 the following 'message' produces the empty string if you
> just hit enter at the mini-buffer prompt. In emacs 23, the 'guess'
> variable is printed as expected.
>
> Is this a known bug?
>
> (let* ((default-directory "~/path/to/project/")
>       (guess (concat default-directory ".foo"))
>       (file (read-file-name
>              "Foo: "
>              (file-name-directory guess)
>              guess
>              nil
>              (file-name-nondirectory guess)
>              )))
>
>  (message file))

Works for me with the current trunk on GNU/Linux.
"Emacs 24" covers a multitude of sins - what do you mean by it?
(M-x report-emacs-bug gives this information.)