Bug: Multiple groups of mutually exclusive tags no longer working [8.3.4 (8.3.4-42-gae73c7-elpaplus @ c:/Users/clange/.emacs.d/elpa/org-plus-contrib-20160425/)]

[Christoph LANGE <math.semantic.web@gmail.com>]

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Dear Org developers,

using the setup given below (started using emacs -q) I can no longer
have multiple groups of mutually exclusive tags.  Only the first group
is recognised as mutually exclusive.

Here is my example file:

#+TAGS: { Bfoo(b) Bbar(B) Cat(c) SO(s) PlanB(P) } { FIX(X) Tentative(T)
NotBusy(Y) OtherPeople(p) }

* Foo

Using org-set-tags-command, it is possible to assign, say, both the tags
FIX and Tentative to the headline Foo.  I would expect this to be
impossible.  Starting the second group on a new #+TAGS: line does not
make a difference.

I tested the same with Org 8.2.10, i.e. the version bundled with my
Emacs, and it worked.

Cheers,

Christoph

Emacs  : GNU Emacs 25.0.92.1 (x86_64-w64-mingw32)
 of 2016-03-03
Package: Org-mode version 8.3.4 (8.3.4-42-gae73c7-elpaplus @
c:/Users/clange/.emacs.d/elpa/org-plus-contrib-20160425/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe
org-babel-hide-result-toggle-maybe
		      org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
		     org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
		   [org-add-hook change-major-mode-hook org-show-block-all append
local] 5]
		 #[nil "\300\301\302\303\304$\207"
		   [org-add-hook change-major-mode-hook org-babel-show-result-all append
		    local]
		   5]
		 org-babel-result-hide-spec org-babel-hide-all-hashes org-eldoc-load)
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
org-babel-execute-safely-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
		  org-cycle-show-empty-lines org-optimize-window-after-visibility-change)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )

-- 
Dr. Christoph Lange, Enterprise Information Systems Department
Applied Computer Science @ University of Bonn; Fraunhofer IAIS
http://langec.wordpress.com/about, Skype duke4701

→ CSCUBS Computer Science Conference for University of Bonn Students
  25 May 2016; submission deadline 28 April – http://cscubs.cs.uni-bonn.de