(imenu--last-menubar-index-alist): Add doc.

(imenu-add-to-menubar):  Reset imenu--last-menubar-index-alist.

1 files changed, 4 insertions, 2 deletions

diff --git a/lisp/imenu.el b/lisp/imenu.el
index f9b33b80b47..4fa74b7ec72 100644
--- a/lisp/imenu.el
+++ b/lisp/imenu.el
@@ -426,8 +426,9 @@ This variable is local in all buffers, once set.")
 
 (make-variable-buffer-local 'imenu--index-alist)
 
-;; The latest buffer index used to update the menu bar menu.
-(defvar imenu--last-menubar-index-alist nil)
+(defvar imenu--last-menubar-index-alist nil
+  "The latest buffer index used to update the menu bar menu.")
+
 (make-variable-buffer-local 'imenu--last-menubar-index-alist)
 
 ;; History list for 'jump-to-function-in-buffer'.
@@ -991,6 +992,7 @@ See the command `imenu' for more information."
                    'imenu-default-create-index-function)))
       (let ((newmap (make-sparse-keymap))
             (menu-bar (lookup-key (current-local-map) [menu-bar])))
+        (setq imenu--last-menubar-index-alist nil)
         (define-key newmap [menu-bar]
           (append (make-sparse-keymap) menu-bar))
         (define-key newmap [menu-bar index]