fix for #757

peer/peer.go

@@ -154,10 +154,12 @@ func (pi *PeerInfo) UnmarshalJSON(b []byte) error {
 		return err
 	}
 	pi.ID = pid
-	addrs := data["Addrs"].([]interface{})
+	addrs, ok := data["Addrs"].([]interface{})
+	if ok {
 		for _, a := range addrs {
 			pi.Addrs = append(pi.Addrs, ma.StringCast(a.(string)))
 		}
+	}
 	return nil
 }