[php-src] Issue #8065: opcache.consistency_checks > 0 is leaking memory in PHP >= 8.1.0 in fpm context

Issue: https://github.com/php/php-src/issues/8065 Author: CyberLine ### Description After upgrading some projects to PHP 8.1.0 and 8.1.2 we could see requests getting slower and slower over time. Restart of the correspondig fpm-pool fixed that for short. After digging in the problem we could isolate and reproduce it: - use a Debian 10 or 11 maschine and install php8.1-fpm and php8.1-opcache. - modify opcache.ini: ``` zend_extension=opcache.so [opcache] opcache.consistency_checks=1 ``` - create a test script (we use laminas-servicemanager here): ``` <?php declare(strict_types=1); chdir(dirname(__DIR__)); require 'vendor/autoload.php'; use Laminas\ServiceManager\ServiceManager; $container = new ServiceManager(); ``` - call that script in a loop 1000 or more times while running htop in another terminal: for i in {1..10000}; do curl localhost/test.php; done; You would see an increment usage of memory that will not getting freed after all. Set opcache.consistency_checks to 0 to check that it will not keep any used memory. ### PHP Version 8.1.0 ### Operating System Debian 10/11