From 787558935cce506d12cf22b5ea1e8187f261a4b3 Mon Sep 17 00:00:00 2001
From: Luigi Pinca <luigipinca@gmail.com>
Date: Tue, 20 Sep 2016 12:02:54 +0200
Subject: [PATCH] dns: tweak regex for IPv6 addresses
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The regex used in `dns.setServers()` to match IPv6 addresses in square
brackets uses a capturing group for the port but this info is not
needed.

This commit replaces the capturing group with a non capturing one.

PR-URL: https://github.com/nodejs/node/pull/8665
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Prince John Wesley <princejohnwesley@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
---
 lib/dns.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/dns.js b/lib/dns.js
index 55351bb77480c7..9a81dfffd6d803 100644
--- a/lib/dns.js
+++ b/lib/dns.js
@@ -293,7 +293,7 @@ exports.setServers = function(servers) {
     if (ipVersion !== 0)
       return newSet.push([ipVersion, serv]);
 
-    const match = serv.match(/\[(.*)\](:\d+)?/);
+    const match = serv.match(/\[(.*)\](?::\d+)?/);
     // we have an IPv6 in brackets
     if (match) {
       ipVersion = isIP(match[1]);