Merge pull request #155 from marten-seemann/guard-against-nil-addrs

guard against nil {Local,Remote}Addr() return values

net/net.go

@@ -248,16 +248,16 @@ func (l *maListener) Accept() (Conn, error) {
 	var raddr ma.Multiaddr
 	// This block protects us in transports (i.e. unix sockets) that don't have
 	// remote addresses for inbound connections.
-	if nconn.RemoteAddr().String() != "" {
-		raddr, err = FromNetAddr(nconn.RemoteAddr())
+	if addr := nconn.RemoteAddr(); addr != nil && addr.String() != "" {
+		raddr, err = FromNetAddr(addr)
 		if err != nil {
 			return nil, fmt.Errorf("failed to convert conn.RemoteAddr: %s", err)
 		}
 	}
 
 	var laddr ma.Multiaddr
-	if nconn.LocalAddr().String() != "" {
-		laddr, err = FromNetAddr(nconn.LocalAddr())
+	if addr := nconn.LocalAddr(); addr != nil && addr.String() != "" {
+		laddr, err = FromNetAddr(addr)
 		if err != nil {
 			return nil, fmt.Errorf("failed to convert conn.LocalAddr: %s", err)
 		}