rem: host = new XPCSafeJSObjectWrapper(host); 
add: host = XPCSafeJSObjectWrapper(host); 
context: function dnsResolve(host) {    host = new XPCSafeJSObjectWrapper(host);    try {        return dns.resolve(host, 0).getNextAddrAsString();    } catch (e) {        return null;    }}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10234/10e61ce970f7d990e424af5d6cb48d69bba55ba2/nsProxyAutoConfig.js/clean/netwerk/base/src/nsProxyAutoConfig.js