From 8244357283b740adacaa4526c0ea60349b0a93bb Mon Sep 17 00:00:00 2001
From: Glenn Morris <rgm@gnu.org>
Date: Wed, 1 Mar 2017 18:29:48 -0500
Subject: [PATCH] Small recover-this-file improvement

* lisp/files.el (recover-this-file): Explicit error if not
visiting a file.  (Bug#23671)
---
 lisp/files.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lisp/files.el b/lisp/files.el
index 7c9271e2f44..c7de4453d75 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -5838,6 +5838,8 @@ an auto-save file."
 (defun recover-this-file ()
   "Recover the visited file--get contents from its last auto-save file."
   (interactive)
+  (or buffer-file-name
+      (user-error "This buffer is not visiting a file"))
   (recover-file buffer-file-name))
 
 (defun recover-file (file)
-- 
2.39.5