Get a PHP segfault

gistfile1.md

First, clone git clone git@github.com:vierbergenlars/gihp.git Check out git checkout 08dc6abfdbf90b1e1a8b10cd7064601fb820d950 And then insert the file above and run with php segv.php

segv.php

<?php
use gihp\Defer\Object as Defer;
use gihp\Defer\Deferrable;
use gihp\Defer\Reference;

require('vendor/autoload.php');

class Node {
    protected $data;
    protected $parent;
    protected $hash;

    function __construct($data, Node $parent=null) {
        $this->data = $data;
        $this->{'parent'} = $parent;
        $this->hash = sha1($data.($parent?$parent->getHash():''));
    }

    function getHash() {
        return $this->hash;
    }

    function getData() {
        return $this->data;
    }

    function getParent() {
        return $this->{'parent'};
    }

    static function import(NodeStore $store, $encoded) {
        $parts = explode("\0", $encoded);
        $data = $parts[0];
        $parent_hash = $parts[1];
        $defer= new Defer(array('data'=>$data, 'parent'=>($parent_hash?new Reference($store, $parent_hash): null), 'hash'=>sha1($data.($parent_hash?$parent_hash:''))), __CLASS__, $store);
        return $defer->getClass();
    }

    function __toString() {
        return $this->data."\0".($this->{'parent'}?$this->{'parent'}->getHash():'');
    }
}

class NodeStore implements \gihp\Defer\Loader {
    private $db;
    function __construct() {
        $this->db = array();
    }

    function addNode(Node $node) {
        $this->db[$node->getHash()] = $node->__toString();
    }

    function getNode($hash) {
        return Node::import($this, $this->db[$hash]);
    }

    function load($hash) {
        return $this->getNode($hash);
    }
}

echo 'Starting';

$store = new NodeStore;

$root = new Node('root');

$xnode = $root;
echo 'Loop init';
for($i=0; $i <100000; $i++) { //
// Add an extra 0 above to get a segv earlier.

//
    $xnode = new Node($i, $xnode);
    $store->addNode($xnode);
}
echo 'Loop exit';
$store->addNode($root);

$node_str = $xnode->__toString();
echo 'Done adding nodes';

$xnode_bis = Node::import($store, $node_str);

echo 'Getting data';
var_dump($xnode_bis->getData());
echo 'Done';