Ticket #53992: 53992.patch

wp-login.php

@@ -985 +985 @@
                  * @since 3.0.0
                  *
                  * @param string $registration_redirect The redirect destination URL.
+                 * @param int|WP_Error $error   User id if registration was successful, WP_Error object otherwise.
                  */
-                $redirect_to = apply_filters( 'registration_redirect', $registration_redirect );
+                $redirect_to = apply_filters( 'registration_redirect', $registration_redirect, $errors );
 
                 login_header( __( 'Registration Form' ), '<p class="message register">' . __( 'Register For This Site' ) . '</p>', $errors );