Properly throw error on failed connection

src/node_net.cc

@@ -337,7 +337,7 @@ int Connection::AfterResolve(eio_req *req) {
   if (address_list) freeaddrinfo(address_list);
 
   // no error. return.
-  if (req->result == 0) {
+  if (req->result == 0 && !r) {
     evcom_stream_attach(EV_DEFAULT_UC_ &connection->stream_);
     goto out;
   }
@@ -348,7 +348,13 @@ int Connection::AfterResolve(eio_req *req) {
    * The fact that I'm modifying a read-only variable here should be
    * good evidence of this.
    */
-  connection->stream_.errorno = req->result;
+
+  if (req->result) {
+    connection->stream_.errorno = req->result;
+  } else {
+    assert(r);
+    assert(connection->stream_.errorno);
+  }
 
   connection->OnClose();