(diff-find-file-name): Only accept regular files, to rule out

/dev/null, directories, etc.

diff --git a/lisp/diff-mode.el b/lisp/diff-mode.el
index e0aee67a62b0f59b7da1744361028217e6602ba7..7cd7375ab98fc8d0d8e290f25e2c92cdfe48bd36 100644 (file)
--- a/lisp/diff-mode.el
+++ b/lisp/diff-mode.el
@@ -646,7 +646,9 @@ PREFIX is only used internally: don't use it."
           ((or (null files)
                (setq file (do* ((files files (cdr files))
                                 (file (car files) (car files)))
-                              ((or (null file) (file-exists-p file))
+                              ;; Use file-regular-p to avoid
+                              ;; /dev/null, directories, etc.
+                              ((or (null file) (file-regular-p file))
                                file))))
            file))
        ;; <foo>.rej patches implicitly apply to <foo>