added some invariant checks to bt_peer_connection

src/bt_peer_connection.cpp

@@ -3035,6 +3035,17 @@ namespace libtorrent
 #ifdef TORRENT_DEBUG
 	void bt_peer_connection::check_invariant() const
 	{
+		boost::shared_ptr<torrent> t = associated_torrent().lock();
+
+		if (!m_disconnect_started && m_initialized)
+		{
+			// none of this matters if we're disconnecting anyway
+			if (t->is_finished())
+				TORRENT_ASSERT(!is_interesting());
+			if (is_seed())
+				TORRENT_ASSERT(upload_only());
+		}
+
 #ifndef TORRENT_DISABLE_ENCRYPTION
 		TORRENT_ASSERT( (bool(m_state != read_pe_dhkey) || m_dh_key_exchange.get())
 				|| !is_local());