Description:
------------
Good afternoon. Fuzzing version 8.1 using AFL. At the moment I have found 9 crashes, all of them cause Segmentation Fault. I did not find any reports about them in the bug reports, so I decided to write, maybe this will help make the PCP safer. In the example below, I indicated one of the cases.

Test script:
---------------
--TEST--
ZE2 __toString() in __destruct
--FILE--
<?php

class Test
{
    function __toString()
    {
        return "Hel       echo $this;
    }
lo\n";
    }

    function __destruct()
    {
        echo $this;
    }
}

$o = new Test;
$o = NULL;

$o = new Test;

?>
====DONE====
--E=
Hello

Expected result:
----------------
exception

Actual result:
--------------
segmentation fault