[php-src] Issue #11187: segfault while `__unserialize()`

Issue: https://github.com/php/php-src/issues/11187 Author: staabm ### Description I had a already started session and let php unserialize a object of the following class: ```php <?php namespace ClxProductNet\PriceSwitch\Model; use ClxProductNet_SessionNS; final class PriceSwitchSession implements \Serializable { // php 7.x serialization public function serialize() { return serialize($this->__serialize()); } // php 7.x serialization public function unserialize($data): void { $this->__unserialize(unserialize($data)); } // php 8.1+ serialization public function __unserialize(string $data): void /* <-- wrong data-type */ { } } ``` Resulted in this output: - segmentation fault But I expected this output instead: - regular fatal error the segfault goes away when I change the type of the parameter given to __unserialize from string to array. array is of course the correct type, but a wrong type should not lead to a segfault ``` php -v PHP 8.1.18 (cli) (built: Apr 14 2023 04:39:44) (NTS) Copyright (c) The PHP Group Zend Engine v4.1.18, Copyright (c) Zend Technologies ``` ### PHP Version 8.1.18 ### Operating System Ubuntu22