[O] orgmode-contacts "wrong type arguments"

[Tory S. Anderson]

Presumably this is related to my having upgraded to:
Org-mode version 8.2.10 (8.2.10-33-g880a2b-elpa)
GNU Emacs 25.0.50.6 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.9) of 
2015-02-10 on localhost.localdomain

I use org-contacts[1] to autofill addresses in GNUs. Normally can use 
"+CATEGORY" to add all names in a category; but now that particular 
functionality seems to be broken (although the package is otherwise 
functional). In my efforts to improve my elisp, can anyone tell me why the code 
doesn't work, and what might have changed to cause it to break?

Error: 
completion-in-region: Wrong type argument: listp, #("NAME <address@hidden>, 
NAME <address@hidden>, NAME <address@hidden>, NAME <address@hidden>" 0 15 
(fontified nil org-category "contacts") 44 65 (fontified nil org-category 
"contacts") 88 99 (fontified nil org-category "contacts") 127 141 (fontified 
nil org-category "contacts"))

Footnotes: 
[1]  https://julien.danjou.info/projects/emacs-packages#org-contacts