anchor.diff:                       {ok, LSock3} ->
                            LSock3;
                        {error, Reason3} ->
  +                         ?P("Listen failed (ifaddr):"
  +                            "~n   Reason3: ~p", [Reason3]),
                            ?SKIPT(listen_failed_str(Reason3))
                    end,
   	    implicit_inet6(S3, Addr),
  
positive.code: 	    implicit_inet6(S1, Loopback),
  	    ok = gen_tcp:close(S1),
  	    %%
  	    Localaddr = ok(get_localaddr()),
  	    S2 = case gen_tcp:listen(0, [{ip, Localaddr}]) of
                       {ok, LSock2} ->
                           LSock2;
                       {error, Reason2} ->
                           ?SKIPT(listen_failed_str(Reason2))
                   end,
  	    implicit_inet6(S2, Localaddr),
  	    ok = gen_tcp:close(S2),
  	    %%
  	    ?P("try ~s ~p", [Host, Addr]),
  
negative.code:     ok              = gen_tcp:close(L),
      ok.
  
  
  t_fdconnect(Config) when is_list(Config) ->
      ?TC_TRY(t_fdconnect, fun() -> do_t_fdconnect(Config) end).
  
  