Description:
------------
When a class destructor spawns one or more new object instances - the php shutdown sequence goes wrong in some cases.

Symptoms - "Undefined static property" error messages for properties that are defined in a class, and/or SIGSEGV exception.

Proposed solution:
https://github.com/commercebyte/php-src/commit/9a8a1c9da129a72c9bf8f3392f954a9e5ca317ff

Test script:
---------------
<?
class b {
    function __destruct() {
        echo "b::destruct\n";
    }
}
class a {
    static $b;
    static $new;
    function __destruct() {
        echo "a::destruct\n";
        self::$b = new b;
        $this::$new[] = new a;
    }
}
new a;

Expected result:
----------------
a::destruct
b::destruct
a::destruct
b::destruct
a::destruct
b::destruct
...
(repeats until php runs out of memory)

Actual result:
--------------
a::destruct
b::destruct
a::destruct
b::destruct
a::destruct
<br />
<b>Fatal error</b>:  Access to undeclared static property: a::$b in <b>test.php</b> on line <b>12</b><br />