Fatal error triggered (PHP 8.1)

Hello,

the following error gets triggered by my website running PHP 8.1:

PHP Fatal error: Uncaught TypeError: fclose(): Argument #1 ($stream) must be of type resource, bool given in /var/www/mydomain.com/wp-content/plugins/wp-super-cache/wp-cache-phase2.php:3227

I think I got rid of it by changing the code to

if ($fp = @fopen( $gc_flag, 'w' ))
  @fclose( $fp );

but a default fix in an upcoming update would be great!