From 38fe2f244ae277ffe5b9618bca669da0bf659ad7 Mon Sep 17 00:00:00 2001
From: Simon Vermeersch <simonvermeersch@gmail.com>
Date: Sun, 13 Aug 2017 14:00:42 +0200
Subject: [PATCH] Fallback correctly to ipv4 when ipv6 is not supported

---
 mitmproxy/net/tcp.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mitmproxy/net/tcp.py b/mitmproxy/net/tcp.py
index 0c2f0e286..e109236e4 100644
--- a/mitmproxy/net/tcp.py
+++ b/mitmproxy/net/tcp.py
@@ -855,6 +855,8 @@ class TCPServer:
         if self.address[0] == 'localhost':
             raise socket.error("Binding to 'localhost' is prohibited. Please use '::1' or '127.0.0.1' directly.")
 
+        self.socket = None
+
         try:
             # First try to bind an IPv6 socket, with possible IPv4 if the OS supports it.
             # This allows us to accept connections for ::1 and 127.0.0.1 on the same socket.