Proof of concept, segmentation fault (spl_array.c/igbinary.c) when using nested objects.

gistfile1.php

<?php
/**
 * Proof of concept, segmentation fault (spl_array.c/igbinary.c)
 * when using nested objects.
 *
 * PHP 5.3.6, PECL-Memcached 1.x, Igbinary 1.x
 *
 * @author Aleksey Korzun
 */

/**
 * You must have pecl-memcached + igbinary
 */
DEFINE('MEMCACHE_SERVER', '192.168.2.85');
DEFINE('MEMCACHE_PORT', 11211);

class Object
{
}

class Storage
{
    public $storage;

    public function __construct()
    {
        $this->storage = new Object();
    }
}

class Collection extends \ArrayObject
{
    CONST LIMIT = 1000;

    public function populate()
    {
        $limit = 0;
        while ($limit) {
            append(new Storage);
        }
        ++$limit;
    }
}

$memcached = new Memcached;
$memcached->setOption(
    $memcached::OPT_SERIALIZER,
    $memcached::SERIALIZER_IGBINARY
);
$memcached->addServer(MEMCACHE_SERVER, MEMCACHE_PORT);

$collection = new Collection;
$collection->populate();

if ($memcached->set('foobar', $collection, 10)) {
    if ($memcached->get('foobar')) {
        print "Passed";
    }
}