Description:
------------
This bug only affects PHP versions 5.6.x.

Test script:
---------------
<?php
class Event {
    public function setTime(\DateTime $time) {
       var_dump($time);
    }
}
function set_event_time(\DateTime $time) {
    var_dump($time);
}
function e_handler() {
    restore_error_handler();
}
set_error_handler('e_handler');

$e = new Event();
$e->setTime(false);

set_event_time(false);

Expected result:
----------------
Fatal error: Uncaught TypeError: Argument 1 passed to Event::setTime() must be an instance of DateTime, boolean given, called in %s on line %d and defined in %s:%d

Actual result:
--------------
bool(false)
bool(false)