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

[Michael Heerdegen]

Peter Münster <pmlists@free.fr> writes:

> - 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

I saw that, too.

And I got a similar error after hitting t d in the agenda (aka "mark as
done").  After the error happened, the according entry in the todo file
was broken...not good.

Michael.