From 0d4546c9655f871f1cecd3fb8ce7dc9c6598cc24 Mon Sep 17 00:00:00 2001
From: Dave Collins <davec@conformal.com>
Date: Fri, 11 Nov 2016 20:49:22 -0600
Subject: [PATCH] server: Return error on address lookup fails.

This corrects an issue introduced by commit
e8f63bc29550705268b533032ccc2ea24f8c86ba where a failure to lookup a
hostname could lead to a panic in certain circumstances.  An error is
now returned in that case as expected.
---
 server.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/server.go b/server.go
index e18b373c..668dc991 100644
--- a/server.go
+++ b/server.go
@@ -2516,6 +2516,9 @@ func addrStringToNetAddr(addr string) (net.Addr, error) {
 	if err != nil {
 		return nil, err
 	}
+	if len(ips) == 0 {
+		return nil, fmt.Errorf("no addresses found for %s", host)
+	}
 
 	port, err := strconv.Atoi(strPort)
 	if err != nil {