From 2e879896ff08220407f0530eaa814db3d61f9552 Mon Sep 17 00:00:00 2001
From: Andrey Meshkov <am@adguard.com>
Date: Tue, 6 Nov 2018 00:52:27 +0300
Subject: [PATCH] Close test upstream

---
 control.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/control.go b/control.go
index 238bc131..63a387b0 100644
--- a/control.go
+++ b/control.go
@@ -218,6 +218,7 @@ func checkDNS(input string) error {
 	if err != nil {
 		return err
 	}
+	defer u.Close()
 
 	alive, err := upstream.IsAlive(u)