bug#23299: 25.1.50; org-timestamp-change: Invalid time zone specification: (nil nil nil)

[Eli Zaretskii]

> From: Peter Münster <pmlists@free.fr>
> Cc: 23299@debbugs.gnu.org
> Date: Sat, 16 Apr 2016 13:39:09 +0200
> 
> On Sat, Apr 16 2016, Eli Zaretskii wrote:
> 
> > Please show a complete recipe for reproducing this problem, starting
> > with "emacs -Q".
> 
> - emacs -Q
> - open /tmp/foo.org
> - M-x org-mode
> - M-S-return (org-insert-todo-heading)
> - C-c C-d (org-deadline)
> - go to the time-stamp
> - M-x org-timestamp-up-day

Thanks.  With this recipe, the problem happens on master, but not on
the emacs-25 branch.  This is because encode-time on master no longer
accepts a list of (nil nil nil) as a valid time-zone specification.
That list looks wrong to me, so it sounds like a bug in Org that was
exposed by the recent changes in encode-time.