From a39cf8ca0b870104f6677138011ef035c621ce49 Mon Sep 17 00:00:00 2001
From: Andreas Politz <politza@hochschule-trier.de>
Date: Fri, 26 Oct 2018 07:42:33 +0200
Subject: Check buffer's liveness before using it

---
 lisp/pdf-view.el | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lisp/pdf-view.el b/lisp/pdf-view.el
index d0337e9..f1e3846 100644
--- a/lisp/pdf-view.el
+++ b/lisp/pdf-view.el
@@ -398,7 +398,9 @@ PNG images in Emacs buffers."
   (image-mode-setup-winprops)
 
   ;; Issue a warning in the future about incompatible modes.
-  (run-with-timer 1 nil #'pdf-view-check-incompatible-modes
+  (run-with-timer 1 nil (lambda (buffer)
+                          (when (buffer-live-p buffer)
+                            (pdf-view-check-incompatible-modes buffer)))
 		  (current-buffer))
   ;; Setup initial page and start display
   (pdf-view-goto-page (or (pdf-view-current-page) 1)))
-- 
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