Ticket #41318: 41318.diff

wp-admin/includes/file.php

@@ -132 +132 @@
         if ( ! $levels )
                 return false;
 
+        // Remove the trailing slash
+    $folder = untrailingslashit( $folder );
+
         $files = array();
         if ( $dir = @opendir( $folder ) ) {
                 while (($file = readdir( $dir ) ) !== false ) {