php5-memcache segfaults with object (un)serialization

[Chris Fryer]

I can reproduce https://bugs.php.net/bug.php?id=63142 in an up-to-date Ubuntu 12.04.3 LTS

Package: php5-memcache
Priority: optional
Section: universe/web
Installed-Size: 151
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Sergey B Kirpichev <email address hidden>
Architecture: amd64
Source: php-memcache
Version: 3.0.6-1
Depends: libc6 (>= 2.7), phpapi-20090626
Suggests: memcached
Filename: pool/universe/p/php-memcache/php5-memcache_3.0.6-1_amd64.deb
Size: 47062
MD5sum: 7d3bf387e029e1d7fe43ab9996842aa3
SHA1: d0f30749170e789311ae062c5346092881190a49
SHA256: de3fad7fe68a68e61ccf55ad923364d9578b0125353e3d24986b2ec0d9c158e0
Description-en: memcache extension module for PHP5
 Memcached is a caching daemon designed especially for dynamic web applications
 to decrease database load by storing objects in memory.
 .
 This extension allows you to work with memcached through handy OO and
 procedural interfaces in your php5 applications.
Homepage: http://pecl.php.net/package/memcache
Description-md5: 58db38616cd7be3fdacd6d17d7baf2e8
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

The test case at bugs.php.net is reproduced below:

<?php
echo "Test: PHP-".phpversion()."/memcache-".phpversion('memcache');
$obj = new StdClass;
$obj->obj = $obj;
$memcache = new Memcache;
$memcache->connect('127.0.0.1', 11211);
$memcache->set('x', $obj, false, 300);
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".";
$x = $memcache->get('x'); echo ".\n";

chris@home:~$ php memcache.php
Test: PHP-5.3.10-1ubuntu3.9/memcache-3.0.6.........
Segmentation fault (core dumped)