(defvar notmuch-hello-mode-map
(let ((map (if (fboundp 'make-composed-keymap)
- ;; Inherit both widget-keymap and notmuch-common-keymap
- (make-composed-keymap widget-keymap)
+ ;; Inherit both widget-keymap and
+ ;; notmuch-common-keymap. We have to use
+ ;; make-sparse-keymap to force this to be a new
+ ;; keymap (so that when we modify map it does not
+ ;; modify widget-keymap).
+ (make-composed-keymap (list (make-sparse-keymap) widget-keymap))
;; Before Emacs 24, keymaps didn't support multiple
;; inheritance,, so just copy the widget keymap since
;; it's unlikely to change.