From 84fdc1bb14b72856a3dac40db1a43a560435706b Mon Sep 17 00:00:00 2001
From: Evan Phoenix <evan@phx.io>
Date: Wed, 20 Jul 2016 10:51:49 -0700
Subject: [PATCH] Be sure to only listen on host:port combos once. Fixes #1022

---
 lib/puma/binder.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/puma/binder.rb b/lib/puma/binder.rb
index be1f6150..2892237f 100644
--- a/lib/puma/binder.rb
+++ b/lib/puma/binder.rb
@@ -246,7 +246,7 @@ module Puma
 
     def localhost_addresses
       addrs = TCPSocket.gethostbyname "localhost"
-      addrs[3..-1]
+      addrs[3..-1].uniq
     end
 
     # Tell the server to listen on host +host+, port +port+.