anchor.diff:              fun() ->
                       Domain = inet6,
                       {ok, LocalAddr} = ?LIB:which_local_addr(Domain),
  -                    do_simple_sockaddr_send_recv(Domain, 0, LocalAddr, Config)
  +                    SockAddr = #{family   => Domain,
  +                                 addr     => LocalAddr,
  +                                 port     => 0},
  +                    do_simple_sockaddr_send_recv(SockAddr, Config)
               end).
   
   
  
positive.code:      t_fdconnect,
       t_implicit_inet6,
       t_accept_inet6_tclass,
       t_simple_local_sockaddr_in6_send_recv,
       t_simple_link_local_sockaddr_in6_send_recv
      ].
  
negative.code: 	 t_local_abstract/1, t_accept_inet6_tclass/1,
  	 s_accept_with_explicit_socket_backend/1,
  
           t_simple_local_sockaddr_in_send_recv/1,
           t_simple_link_local_sockaddr_in_send_recv/1,
           t_simple_local_sockaddr_in6_send_recv/1,
           t_simple_link_local_sockaddr_in6_send_recv/1
  	]).
  