On exit() in Future cancelled() and done() wont give true, but value() give Segmentation fault

[webrobot1]

This code

<?php
use parallel\{Channel, Runtime, Future, Events, Events\Event, Events\Input};

$runtime = 	new Runtime();
$future = $runtime ->run
(
	function() 
	{
		exit();
	}
);



echo $future->done().'|';
echo $future->cancelled().'|';
#echo $future->value().'|';


exit('can work more');

I cant check what Future is exit status but if i will get value() script will force exit. But if will not check exit - it can work more.

How i can check the exit status or how dint exit main thread if get Future value what execute exit