Description:
------------
PHP Fatal error:  Invalid opcode 138/1/1.



Test script:
---------------
public static function createFromFormat($format, $date, ?\DateTimeZone $tz = null): \DateTimeInterface
{
    if ($tz !== null
        || ($tz instanceof \DateTimeZone && !in_array($tz->getName(), ['UTC', 'Z'], true))
    ) {
        $msg = 'Date objects must have UTC as their timezone';
        throw new \UnexpectedValueException($msg);
    }
}

createFromFormat('m/d/Y', '12/07/2017', null);