Ticket #31918: 31918.patch

src/wp-includes/user.php

@@ -1748 +1748 @@
         wp_cache_delete( $user->user_login, 'userlogins' );
         wp_cache_delete( $user->user_email, 'useremail' );
         wp_cache_delete( $user->user_nicename, 'userslugs' );
+
+        do_action( 'delete_user_cache' );
 }
 
 /**