Ticket #41980: 41980.diff

src/wp-admin/menu.php

@@ -96 +96 @@
 foreach ( array_merge( $builtin, $types ) as $ptype ) {
         $ptype_obj = get_post_type_object( $ptype );
         // Check if it should be a submenu.
-        if ( $ptype_obj->show_in_menu !== true )
+        if ( $ptype_obj->show_in_menu != true )
                 continue;
         $ptype_menu_position = is_int( $ptype_obj->menu_position ) ? $ptype_obj->menu_position : ++$_wp_last_object_menu; // If we're to use $_wp_last_object_menu, increment it first.
         $ptype_for_id = sanitize_html_class( $ptype );