Remember to cover the basics, that is, what you expected to happen and
what in fact did happen. You don't know how to make a good report? See
http://orgmode.org/manual/Feedback.html#Feedback
Your bug report will be posted to the Org mailing list.
>From emacs -Q:
M-x org-mode
Insert the following:
* Test
DEADLINE: <2017-10-06 Sat>
Place point on timestamp and hit C-c C-c
Expected:
Timestamp updated to <2017-10-06 Fri>
Actual:
This is displayed in *Messages*:
user-error: ‘C-c C-c’ can do nothing useful here
Emacs : GNU Emacs 26.0.60 (build 1, x86_64-apple-darwin17.0.0, NS
appkit-1561.00 Version 10.13 (Build 17A365))
of 2017-09-30
Package: Org mode version 9.1.2 (9.1.2-elpaplus @
/Users/aaronjensen/.emacs.d/elpa/26.0/org-plus-contrib-20171004/)