[O] Tag completion does not work well with org-complete-tags-always-offer-all-agenda-tags

[Alain . Cochard]

Hello.

With variable org-complete-tags-always-offer-all-agenda-tags set to
true, tag completion does not work as I expect.  Specifically, upon
'C-c C-q' or 'C-c C-c', it works fine if I enter in the minibuffer
some letter and then press <TAB>, but not if I just press <TAB>; in
that case, a colon (:) is inserted in the minibuffer, and another
colon for each subsequent <TAB>, ad infinitum.  Is this normal?

Incidentally, shouldn't this variable be documented in the manual?
(Section "6.2 Setting tags" would seem a natural place for that.)  I
had to resort to internet search...

Regards,
Alain

I have:

GNU Emacs 24.5.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.18.9) of
2016-04-11 on buildvm-25.phx2.fedoraproject.org

Org mode version 9.1.12 (9.1.12-elpa @
/home/cochard/.emacs.d/elpa/org-20180427/)

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