diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/class-wp-user.php
--- a/wp/wp-includes/class-wp-user.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/class-wp-user.php	Wed Sep 21 18:19:35 2022 +0200
@@ -40,7 +40,7 @@
 	 * User data container.
 	 *
 	 * @since 2.0.0
-	 * @var object
+	 * @var stdClass
 	 */
 	public $data;
 
@@ -167,6 +167,9 @@
 	 * @param int    $site_id Optional. The site ID to initialize for.
 	 */
 	public function init( $data, $site_id = '' ) {
+		if ( ! isset( $data->ID ) ) {
+			$data->ID = 0;
+		}
 		$this->data = $data;
 		$this->ID   = (int) $data->ID;
 
@@ -199,7 +202,7 @@
 			if ( ! is_numeric( $value ) ) {
 				return false;
 			}
-			$value = intval( $value );
+			$value = (int) $value;
 			if ( $value < 1 ) {
 				return false;
 			}
@@ -645,7 +648,7 @@
 	 */
 	public function level_reduction( $max, $item ) {
 		if ( preg_match( '/^level_(10|[0-9])$/i', $item, $matches ) ) {
-			$level = intval( $matches[1] );
+			$level = (int) $matches[1];
 			return max( $max, $level );
 		} else {
 			return $max;