dired ‘M’ should not complain about ‘.’ and ‘..’

* lisp/dired-aux.el (dired-do-redisplay):
Allow redisplay of ‘.’ and ‘..’ (Bug#26528).

1 files changed, 5 insertions, 3 deletions

diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index d7ca0527879..ec07f9bf735 100644
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -1266,12 +1266,14 @@ See Info node `(emacs)Subdir switches' for more details."
     ;; message much faster than making dired-map-over-marks show progress
     (dired-uncache
      (if (consp dired-directory) (car dired-directory) dired-directory))
-    (dired-map-over-marks (let ((fname (dired-get-filename))
+    (dired-map-over-marks (let ((fname (dired-get-filename nil t))
                                 ;; Postpone readin hook till we map
                                 ;; over all marked files (Bug#6810).
                                 (dired-after-readin-hook nil))
-                            (message "Redisplaying... %s" fname)
-                            (dired-update-file-line fname))
+                            (if (not fname)
+                                (error "No file on this line")
+                              (message "Redisplaying... %s" fname)
+                              (dired-update-file-line fname)))
                           arg)
     (run-hooks 'dired-after-readin-hook)
     (dired-move-to-filename)