(Buffer-menu-revert-function): Clear out undo info before reverting

and disable undo recording while reverting.

1 files changed, 5 insertions, 1 deletions

diff --git a/lisp/buff-menu.el b/lisp/buff-menu.el
index 1c3fa704041..8e1a3e69295 100644
--- a/lisp/buff-menu.el
+++ b/lisp/buff-menu.el
@@ -198,11 +198,15 @@ Letters do not insert themselves; instead, they are commands.
   (revert-buffer))
 
 (defun Buffer-menu-revert-function (ignore1 ignore2)
+  (or (eq buffer-undo-list t)
+      (setq buffer-undo-list nil))
   ;; We can not use save-excursion here.  The buffer gets erased.
   (let ((ocol (current-column))
         (oline (progn (move-to-column 4)
                       (get-text-property (point) 'buffer)))
-        (prop (point-min)))
+        (prop (point-min))
+        ;; do not make undo records for the reversion.
+        (buffer-undo-list t))
     (list-buffers-noselect Buffer-menu-files-only)
     (while (setq prop (next-single-property-change prop 'buffer))
       (when (eq (get-text-property prop 'buffer) oline)