(let ((buffer (get-buffer-create (notmuch-search-buffer-title query))))
(switch-to-buffer buffer)
(notmuch-search-mode)
+ ;; Don't track undo information for this buffer
+ (set 'buffer-undo-list t)
(set 'notmuch-search-query-string query)
(set 'notmuch-search-oldest-first oldest-first)
(set 'notmuch-search-target-thread target-thread)