Emacs 23.2 queries by default about killing existing processes. This
is annoying when one wants to interrupt long search with 'q' key.
Disable this behavior for notmuch.
                       "--sort=newest-first")
                     query)))
          (set-process-sentinel proc 'notmuch-search-process-sentinel)
-         (set-process-filter proc 'notmuch-search-process-filter))))
+         (set-process-filter proc 'notmuch-search-process-filter)
+         (set-process-query-on-exit-flag proc nil))))
     (run-hooks 'notmuch-search-hook)))
 
 (defun notmuch-search-refresh-view ()