(rng-clear-cached-state (point-min) (point-max)))
;; 1+ to clear empty overlays at (point-max)
(rng-clear-overlays (point-min) (1+ (point-max))))
(rng-clear-cached-state (point-min) (point-max)))
;; 1+ to clear empty overlays at (point-max)
(rng-clear-overlays (point-min) (1+ (point-max))))