From e0451e3e2af64cc975dd76389dc3ea4f8b9c2a62 Mon Sep 17 00:00:00 2001
From: Jeremy Rubin <jeremy.l.rubin@gmail.com>
Date: Sun, 19 Feb 2017 13:18:04 -0500
Subject: [PATCH] Fix subscript[0] bug in net.cpp if GetGroup returns a 0-sized
 vector

---
 src/net.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/net.cpp b/src/net.cpp
index 301cf58b87..5bf3af7ea3 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -2876,5 +2876,5 @@ uint64_t CConnman::CalculateKeyedNetGroup(const CAddress& ad) const
 {
     std::vector<unsigned char> vchNetGroup(ad.GetGroup());
 
-    return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(&vchNetGroup[0], vchNetGroup.size()).Finalize();
+    return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(vchNetGroup.data(), vchNetGroup.size()).Finalize();
 }