From 57176b410d4bd4237ac44da36f6268970a4b2546 Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Thu, 6 Dec 2018 10:51:37 +0800
Subject: [PATCH] Fix: resolve ip crash

---
 dns/client.go | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/dns/client.go b/dns/client.go
index b443c5c0..7559ea37 100644
--- a/dns/client.go
+++ b/dns/client.go
@@ -131,12 +131,14 @@ func (r *Resolver) resolveIP(m *D.Msg) (msg *D.Msg, err error) {
 			return nil, errors.New("GeoIP can't use")
 		}
 
-		ips, _ := r.msgToIP(res.Msg)
-		if record, _ := mmdb.Country(ips[0]); record.Country.IsoCode == "CN" || record.Country.IsoCode == "" {
-			// release channel
-			go func() { <-fallbackMsg }()
-			msg = res.Msg
-			return
+		ips, err := r.msgToIP(res.Msg)
+		if err == nil {
+			if record, _ := mmdb.Country(ips[0]); record.Country.IsoCode == "CN" || record.Country.IsoCode == "" {
+				// release channel
+				go func() { <-fallbackMsg }()
+				msg = res.Msg
+				return msg, err
+			}
 		}
 	}