Ticket #37892: 37892.patch

wp-includes/class-wp-rewrite.php

@@ -1475 +1475 @@
                 if ( empty($this->rules) ) {
                         $this->matches = 'matches';
                         $this->rewrite_rules();
+                        if ( ! did_action( 'wp_loaded' ) ) {
+                                add_action( 'wp_loaded', array( $this, 'flush_rules' ) );
+                                return $this->rules;
+                        }
                         update_option('rewrite_rules', $this->rules);
                 }