Description

We have some code that worked without any issues on PHP 8.0, but it's failing with a segmentation fault on 8.1.
I'm not sure whether it's a PHPUnit or PHP issue... So please see the code. Mock creation triggers the problem.

Test repo: b1rdex/php-8.1-segfault

I've opened sebastianbergmann/phpunit#4844 for PHPUnit, but the issue was closed with a piece of advice to report it to PHP. So please see the test repo for the details about the issue.

PHP Version

8.1.1

Operating System

Docker official image