--- a/net/resolvers/service.lua	Thu Nov 07 19:23:42 2019 +0100
+++ b/net/resolvers/service.lua	Fri Nov 08 00:58:03 2019 +0100
@@ -29,6 +29,7 @@
 	if not self.hostname then
 		-- FIXME report IDNA error
 		cb(nil);
+		return;
 	end
 
 	local targets = {};