(imenu--split-menu): Copy menulist before sorting.

(imenu--generic-function): Use START, not BEG, as pos of definition.

diff --git a/lisp/imenu.el b/lisp/imenu.el
index af61749..6ee72a8 100644 (file)
--- a/lisp/imenu.el
+++ b/lisp/imenu.el
@@ -532,7 +532,7 @@ A nested sub-alist element looks like (INDEX-NAME SUB-ALIST).")
        (push item keep-at-top)
        (setq menulist (delq item menulist))))
     (if imenu-sort-function
-       (setq menulist (sort menulist imenu-sort-function)))
+       (setq menulist (sort (copy-sequence menulist) imenu-sort-function)))
     (if (> (length menulist) imenu-max-items)
        (setq menulist
              (mapcar
@@ -817,32 +817,30 @@ depending on PATTERNS."
                (setq start (point))
                (goto-char (match-end index))
                (setq beg (match-beginning index))
-               (goto-char beg)
+               ;; Go to the start of the match.
+               ;; That's the official position of this definition.
+               (goto-char start)
                (imenu-progress-message prev-pos nil t)
                ;; Add this sort of submenu only when we've found an
                ;; item for it, avoiding empty, duff menus.
                (unless (assoc menu-title index-alist)
                  (push (list menu-title) index-alist))
                (if imenu-use-markers
-                   (setq beg (copy-marker beg)))
+                   (setq start (copy-marker start)))
                (let ((item
                       (if function
                           (nconc (list (match-string-no-properties index)
-                                       beg function)
+                                       start function)
                                  rest)
                         (cons (match-string-no-properties index)
-                              beg)))
+                              start)))
                      ;; This is the desired submenu,
                      ;; starting with its title (or nil).
                      (menu (assoc menu-title index-alist)))
                  ;; Insert the item unless it is already present.
                  (unless (member item (cdr menu))
                    (setcdr menu
-                           (cons item (cdr menu)))))
-               ;; Move to the start of the entire match,
-               ;; to ensure we keep moving backwards
-               ;; as long as the match is nonempty.
-               (goto-char start))))
+                           (cons item (cdr menu))))))))
          (set-syntax-table old-table)))
     (imenu-progress-message prev-pos 100 t)
     ;; Sort each submenu by position.