Description:
------------
This crashes both on PHP 5.0.3 on Windows 2003 / Apache 2.0.52 and Centos 3 (Redhat Entperise Linux 3 for cheapskates) with Apache 2.0.48 and PHP 5.0.2

This occurs due to the Exception thrown. Removing the exception will prevent the crash.

Reproduce code:
---------------
<?php

header('Content-type: text/plain');
class FooBar implements ArrayAccess {
	private $array = array();

	public function offsetExists($index) {
		return isset($this->array[$index]);
	}

	public function offsetGet($index) {
		return $this->array[$index];
	}

	public function offsetSet($index, $value) {
		$this->array[$index] = $value;
	}

	public function offsetUnset($index) {
		throw new Exception('Just try and make me crash ya sucker ;-)');
		unset($this->array[$index]);
	}

}

$i = 0;
$foo = new FooBar();
$foo[$i] = $i++;
$foo[$i] = $i++;
$foo[$i] = $i++;
unset($foo[1]);

print_R($foo);
?>

Expected result:
----------------
$foo would dump out it's array elements which should be 0 and 2

Actual result:
--------------
Apache crash (exists with Parent: child process exited with status 3221225477 -- Restarting on Windows Apache 2 log, dunno about Linux, can't be faffed to mess about in SSH, however I do not get a HTTP reponse, and therefore I assume it segfaults)