phan under php8.1 also detects PhanImpossibleTypeComparisonInLoop here,
but that cannot suppressed under php7.4,
so use @phan-var to set to the correct type, but keep the comment.
The suppression was added with 8328acb9 for a update of phan
According to the doc proc_get_status can only return array
(at least under php8.1)
Change-Id: Ieda5abc30126eed2e3a9f5fc283d36e64180f496
This fixes a warning on php8.1 related to preg_match_all returning
null when given invalid UTF-8.
I made a separate patch to change the null into an exception Ic0c9083b
In a sense, this is a follow-up to ec103b6966.
Bug: T319218
Change-Id: Ia17fc2fa428ec35bdbd242f1127fcdff501fb741