bug#5314: Acknowledgement (23.1; Inconsistent treatment of auto-save files)

[Kevin Rodgers]

Uday S Reddy wrote:
> I did some more testing of the functions after my initial report.  The
> situation seems a lot more complex than I had imagined.
>
> With an old auto-save file on the disk, the following sequence done on
> a buffer seems to always return nil:
>
>   (progn (insert "x") (recent-auto-save-p))

That could be explained by the dependencies on auto-save-interval and
auto-save-timeout.  There is no guarantee that Emacs will auto-save
after the insert, regardless whether an old auto-save file exists.

> Killing the buffer in this case does not affect the old auto-save
> file.
>
> The following sequence seems to always return t
>
>   (progn (set-buffer-modified-p t) (recent-auto-save-p))

Hmmm, that should also depend on auto-save-interval and auto-save-timeout.

> Killing the buffer in this case deletes the old auto-save file.
>
> So, it appears that recent-auto-save-p and kill-buffer are consistent
> with each other.  But their behaviour is paradoxical with regard to
> set-buffer-modified-p.

--
Kevin Rodgers
Denver, Colorado, USA