Limit the undo actions to 100 actions by Lars Magne Ingebrigtsen <larsi@gnus.org>.

2 files changed, 6 insertions, 0 deletions

diff --git a/lisp/gnus/ChangeLog b/lisp/gnus/ChangeLog
index 991a9910e7f..19160dc8faf 100644
--- a/lisp/gnus/ChangeLog
+++ b/lisp/gnus/ChangeLog
@@ -1,5 +1,8 @@
 2010-08-30  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
+        * gnus-undo.el (gnus-undo-register-1): Limit the undo actions to 100
+        actions.
+
         * gnus-group.el (gnus-group-completing-read): Protect against not
         having completion-styles bound.
 
diff --git a/lisp/gnus/gnus-undo.el b/lisp/gnus/gnus-undo.el
index d11b778f351..802ae63caa4 100644
--- a/lisp/gnus/gnus-undo.el
+++ b/lisp/gnus/gnus-undo.el
@@ -154,6 +154,9 @@ FORMS may use backtick quote syntax."
      ;; We are on a boundary, so we create a new action.
      (gnus-undo-boundary
       (push (list function) gnus-undo-actions)
+      ;; Don't let the undo actions grow infinitely.
+      (when (> (length gnus-undo-actions) 100)
+        (setcdr (nthcdr 100 gnus-undo-actions) nil))
       (setq gnus-undo-boundary nil))
      ;; Prepend the function to an old action.
      (gnus-undo-actions