Ticket #56983: 56983.patch

wp-admin/includes/upgrade.php

@@ -2160 +2160 @@
  *
  * @ignore
  * @since 5.5.0
+ * 
+ * @global int $wp_current_db_version The old (current) database version.
  */
 function upgrade_550() {
         global $wp_current_db_version;
@@ -2198 +2200 @@
  *
  * @ignore
  * @since 5.6.0
+ * 
+ * @global int $wp_current_db_version The old (current) database version.
+ * @global wpdb $wpdb                  WordPress database abstraction object.
  */
 function upgrade_560() {
         global $wp_current_db_version, $wpdb;