Ticket #20778: 20778.2.patch

wp-includes/functions.php

@@ -1404 +1404 @@
         if ( function_exists('sys_get_temp_dir') ) {
                 $temp = sys_get_temp_dir();
                 if ( @is_dir( $temp ) && ( $is_win ? win_is_writable( $temp ) : @is_writable( $temp ) ) ) {
-                        return trailingslashit( $temp );
+                        return trailingslashit( rtrim( $temp, '\\' ) );
                 }
         }