Ticket #39354: 39354.patch

src/wp-includes/class-wp-term-query.php

@@ -305 +305 @@
                 global $wpdb;
 
                 $this->parse_query( $this->query_vars );
-                $args = $this->query_vars;
+                $args = &$this->query_vars;
 
                 // Set up meta_query so it's available to 'pre_get_terms'.
                 $this->meta_query = new WP_Meta_Query();