Bug report

Since PHP 8, @ Error Suppression operator does not silent fatal errors anymore.
See https://php.watch/versions/8.0/fatal-error-suppression for more.

For exemple, this line :
https://github.com/phpstan/phpstan-rrc/blob/3a08cb018572938ca6b90f861c5fbca17baeab4c/src/Command/CommandHelper.php#L238

now output :

Warning Error: mkdir(): File exists
In [phar:///var/www/html/vendor/phpstan/phpstan/phpstan/src/Command/CommandHelper.php, line 183]

Nothing is really broken but the error output is not expected and might be confusing for some people ...