gnus-icalendar.el: Fix bug in gnus-icalendar-identities

* lisp/gnus/gnus-icalendar.el (gnus-icalendar-event--find-attendee):
(gnus-icalendar-identities) `gnus-ignored-from-addresses' and
`message-alternative-emails' may be functions. This is not
supported by `gnus-icalendar-event--find-attendee' (bug#43908).

1 files changed, 6 insertions, 5 deletions

diff --git a/lisp/gnus/gnus-icalendar.el b/lisp/gnus/gnus-icalendar.el
index 7d4fa6c35cc..d7e35c55875 100644
--- a/lisp/gnus/gnus-icalendar.el
+++ b/lisp/gnus/gnus-icalendar.el
@@ -180,8 +180,10 @@
 		      (or (member (attendee-name prop) name-or-email)
 			  (let ((att-email (attendee-email prop)))
 			    (gnus-icalendar-find-if
-			     (lambda (email)
-			       (string-match email att-email))
+			     (lambda (str-or-fun)
+                   (if (functionp str-or-fun)
+                       (funcall str-or-fun att-email)
+                     (string-match str-or-fun att-email)))
 			     name-or-email))))))
       (gnus-icalendar-find-if #'attendee-prop-matches-p event-props))))
 
@@ -763,9 +765,8 @@ These will be used to retrieve the RSVP information from ical events."
 	  (lambda (x) (if (listp x) x (list x)))
 	  (list user-full-name (regexp-quote user-mail-address)
 		;; NOTE: these can be lists
-		gnus-ignored-from-addresses ; already regexp-quoted
-		(unless (functionp message-alternative-emails) ; String or function.
-		  message-alternative-emails)
+		gnus-ignored-from-addresses ; String or function.
+		message-alternative-emails  ;  String or function.
 		(mapcar #'regexp-quote gnus-icalendar-additional-identities)))))
 
 ;; TODO: make the template customizable