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: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/2b2423e9e6b6204be71da41510bd133c282d5a4a/nsProxyAutoConfig.js/buggy/netwerk/base/src/nsProxyAutoConfig.js