Handle errors getting the IP

Should help facebook/create-react-app#3690

Author: gaearon

lib/detect-port.js

@@ -72,7 +72,14 @@ function tryListen(host, port, maxPort, callback) {
         }
 
         // 4. check current ip
-        listen(port, address.ip(), (err, realPort) => {
+        let ip;
+        try {
+          ip = address.ip()
+        } catch (err) {
+          return handleError(err)
+        }
+
+        listen(port, ip, (err, realPort) => {
           if (err) {
             return handleError(err)
           }