diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/class-walker-page.php
--- a/wp/wp-includes/class-walker-page.php	Wed Sep 21 18:19:35 2022 +0200
+++ b/wp/wp-includes/class-walker-page.php	Tue Sep 27 16:37:53 2022 +0200
@@ -30,7 +30,7 @@
 	 * Database fields to use.
 	 *
 	 * @since 2.1.0
-	 * @var array
+	 * @var string[]
 	 *
 	 * @see Walker::$db_fields
 	 * @todo Decouple this.
@@ -93,14 +93,20 @@
 	 *
 	 * @see Walker::start_el()
 	 * @since 2.1.0
+	 * @since 5.9.0 Renamed `$page` to `$data_object` and `$current_page` to `$current_object_id`
+	 *              to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param string  $output       Used to append additional content. Passed by reference.
-	 * @param WP_Post $page         Page data object.
-	 * @param int     $depth        Optional. Depth of page. Used for padding. Default 0.
-	 * @param array   $args         Optional. Array of arguments. Default empty array.
-	 * @param int     $current_page Optional. Page ID. Default 0.
+	 * @param string  $output            Used to append additional content. Passed by reference.
+	 * @param WP_Post $data_object       Page data object.
+	 * @param int     $depth             Optional. Depth of page. Used for padding. Default 0.
+	 * @param array   $args              Optional. Array of arguments. Default empty array.
+	 * @param int     $current_object_id Optional. ID of the current page. Default 0.
 	 */
-	public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) {
+	public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$page            = $data_object;
+		$current_page_id = $current_object_id;
+
 		if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
 			$t = "\t";
 			$n = "\n";
@@ -120,14 +126,14 @@
 			$css_class[] = 'page_item_has_children';
 		}
 
-		if ( ! empty( $current_page ) ) {
-			$_current_page = get_post( $current_page );
+		if ( ! empty( $current_page_id ) ) {
+			$_current_page = get_post( $current_page_id );
 
 			if ( $_current_page && in_array( $page->ID, $_current_page->ancestors, true ) ) {
 				$css_class[] = 'current_page_ancestor';
 			}
 
-			if ( $page->ID == $current_page ) {
+			if ( $page->ID == $current_page_id ) {
 				$css_class[] = 'current_page_item';
 			} elseif ( $_current_page && $page->ID === $_current_page->post_parent ) {
 				$css_class[] = 'current_page_parent';
@@ -143,13 +149,13 @@
 		 *
 		 * @see wp_list_pages()
 		 *
-		 * @param string[] $css_class    An array of CSS classes to be applied to each list item.
-		 * @param WP_Post  $page         Page data object.
-		 * @param int      $depth        Depth of page, used for padding.
-		 * @param array    $args         An array of arguments.
-		 * @param int      $current_page ID of the current page.
+		 * @param string[] $css_class       An array of CSS classes to be applied to each list item.
+		 * @param WP_Post  $page            Page data object.
+		 * @param int      $depth           Depth of page, used for padding.
+		 * @param array    $args            An array of arguments.
+		 * @param int      $current_page_id ID of the current page.
 		 */
-		$css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page ) );
+		$css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page_id ) );
 		$css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : '';
 
 		if ( '' === $page->post_title ) {
@@ -162,7 +168,7 @@
 
 		$atts                 = array();
 		$atts['href']         = get_permalink( $page->ID );
-		$atts['aria-current'] = ( $page->ID == $current_page ) ? 'page' : '';
+		$atts['aria-current'] = ( $page->ID == $current_page_id ) ? 'page' : '';
 
 		/**
 		 * Filters the HTML attributes applied to a page menu item's anchor element.
@@ -175,12 +181,12 @@
 		 *     @type string $href         The href attribute.
 		 *     @type string $aria-current The aria-current attribute.
 		 * }
-		 * @param WP_Post $page         Page data object.
-		 * @param int     $depth        Depth of page, used for padding.
-		 * @param array   $args         An array of arguments.
-		 * @param int     $current_page ID of the current page.
+		 * @param WP_Post $page            Page data object.
+		 * @param int     $depth           Depth of page, used for padding.
+		 * @param array   $args            An array of arguments.
+		 * @param int     $current_page_id ID of the current page.
 		 */
-		$atts = apply_filters( 'page_menu_link_attributes', $atts, $page, $depth, $args, $current_page );
+		$atts = apply_filters( 'page_menu_link_attributes', $atts, $page, $depth, $args, $current_page_id );
 
 		$attributes = '';
 		foreach ( $atts as $attr => $value ) {
@@ -216,15 +222,16 @@
 	 * Outputs the end of the current element in the tree.
 	 *
 	 * @since 2.1.0
+	 * @since 5.9.0 Renamed `$page` to `$data_object` to match parent class for PHP 8 named parameter support.
 	 *
 	 * @see Walker::end_el()
 	 *
-	 * @param string  $output Used to append additional content. Passed by reference.
-	 * @param WP_Post $page   Page data object. Not used.
-	 * @param int     $depth  Optional. Depth of page. Default 0 (unused).
-	 * @param array   $args   Optional. Array of arguments. Default empty array.
+	 * @param string  $output      Used to append additional content. Passed by reference.
+	 * @param WP_Post $data_object Page data object. Not used.
+	 * @param int     $depth       Optional. Depth of page. Default 0 (unused).
+	 * @param array   $args        Optional. Array of arguments. Default empty array.
 	 */
-	public function end_el( &$output, $page, $depth = 0, $args = array() ) {
+	public function end_el( &$output, $data_object, $depth = 0, $args = array() ) {
 		if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) {
 			$t = "\t";
 			$n = "\n";