From 22145d8cfa4206e2d1fa63dd2dee131d05990140 Mon Sep 17 00:00:00 2001
From: Steven Siloti <ssiloti@gmail.com>
Date: Thu, 18 May 2017 19:57:06 -0700
Subject: [PATCH] don't assert when removing a link-local IPv6 interface

---
 src/kademlia/dht_tracker.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/kademlia/dht_tracker.cpp b/src/kademlia/dht_tracker.cpp
index fe0b84492..151dcad7c 100644
--- a/src/kademlia/dht_tracker.cpp
+++ b/src/kademlia/dht_tracker.cpp
@@ -156,6 +156,12 @@ namespace libtorrent { namespace dht {
 
 	void dht_tracker::delete_socket(aux::session_listen_socket* s)
 	{
+#if TORRENT_USE_IPV6
+		address local_address = s->get_local_endpoint().address();
+		// since we don't start nodes on local IPv6 interfaces we don't need to remove them either
+		if (local_address.is_v6() && is_local(local_address))
+			return;
+#endif
 		TORRENT_ASSERT(m_nodes.count(s) == 1);
 		m_nodes.erase(s);
 	}