Description:
------------
A simple SoapClient call causes PHP (both fpm and cli) to crash with the following backtrace

http://pastebin.com/edZiFUgr


The WSDL-file: http://pastebin.com/ygjiXtTU

Same code works fine on PHP 5

Test script:
---------------
<?php
$soap_parameters = array();
$soap_parameters['termSystem'] = array('_' => '', 'id' => '1.2.246.537.6.1');
$soap_parameters['find'] = array('matchText' => array('_' => 'D09', 'partial' => 2));
$soapClient = new SoapClient("CodesetService.wsdl", array(
        "trace" => 1,
        "exceptions" => 0,
        "cache_wsdl" => 0
    )
);
var_dump($soapClient->LookupCodes($soap_parameters));