--- a/net/server_epoll.lua	Sat May 25 16:14:31 2019 +0200
+++ b/net/server_epoll.lua	Tue Jul 23 18:06:34 2019 +0200
@@ -694,6 +694,7 @@
 		return nil, "invalid socket type";
 	end
 	local conn, err = create();
+	if not conn then return conn, err; end
 	local ok, err = conn:settimeout(0);
 	if not ok then return ok, err; end
 	local ok, err = conn:setpeername(addr, port);