PHP warning: in_array() expects parameter 2 to be array

Reopening as requested. I've installed security_review 2.0.1 and notice the error reported in this issue running drush secrev with Drupal 9.5.4 on PHP 8.1. Applying the patch in #6 resolves the issue. The issue only affected CLI execution of the checks. The web UI worked without issue.

So assuming
$groups = posix_getgroups();

returns false wonder if there's a default that should be set.

Automatically closed - issue fixed for 2 weeks with no activity.