From: Eli Zaretskii <eliz@gnu.org>
Date: Sat, 9 Mar 2019 10:51:33 +0000 (+0200)
Subject: Avoid errors in Auto Revert mode
X-Git-Tag: emacs-26.2~36
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=82d4b98;p=emacs.git

Avoid errors in Auto Revert mode

* lisp/autorevert.el (auto-revert-buffers): Cancel
auto-revert-timer only if it is non-nil.  This avoids errors
on first invocation of Auto-Revert mode.
---

diff --git a/lisp/autorevert.el b/lisp/autorevert.el
index d1b8f94a8e2..242344fe9d1 100644
--- a/lisp/autorevert.el
+++ b/lisp/autorevert.el
@@ -813,7 +813,8 @@ the timer when no buffers need to be checked."
       ;; Check if we should cancel the timer.
       (when (and (not global-auto-revert-mode)
 		 (null auto-revert-buffer-list))
-	(cancel-timer auto-revert-timer)
+        (if (timerp auto-revert-timer)
+            (cancel-timer auto-revert-timer))
 	(setq auto-revert-timer nil)))))