Require that the buffer that we're trying to patch exist

* lisp/vc/ediff.el (ediff-patch-buffer): Require that the
buffer that we're trying to patch exist (bug#21852).

Copyright-paperwork-exempt: yes

diff --git a/lisp/vc/ediff.el b/lisp/vc/ediff.el
index 71099ab4d6e5c7e5ea5443033faa3ef1e4124576..e5e16a12f967b32daa3b36eb472d5b47dfef6bea 100644 (file)
--- a/lisp/vc/ediff.el
+++ b/lisp/vc/ediff.el
@@ -1401,9 +1401,8 @@ patch. If not given, the user is prompted according to the prefix argument."
         (if arg (prefix-numeric-value arg)) patch-buf))
   (ediff-patch-buffer-internal
    patch-buf
-   (read-buffer
-    "Which buffer to patch? "
-    (ediff-other-buffer patch-buf))))
+   (read-buffer "Which buffer to patch? " (ediff-other-buffer patch-buf)
+                'require-match)))
 
 
 ;;;###autoload