anchor.diff:  %% locally closed while the process is calling the recvmsg function.
   %% Socket is IPv4.
   
  -sc_recvmsg_response_local_close_tcp4(suite) ->
  -    [];
  -sc_recvmsg_response_local_close_tcp4(doc) ->
  -    [];
  -sc_recvmsg_response_local_close_tcp4(_Config) when is_list(_Config) ->
  -    tc_try(sc_recvmsg_response_local_close_tcp4,
  +sc_lc_recvmsg_response_tcp4(suite) ->
  +    [];
  +sc_lc_recvmsg_response_tcp4(doc) ->
  +    [];
  +sc_lc_recvmsg_response_tcp4(_Config) when is_list(_Config) ->
  +    tc_try(sc_lc_recvmsg_response_tcp4,
              fun() ->
                      not_yet_implemented(),
                      Recv      = fun(Sock) -> socket:recvmsg(Sock) end,
  
positive.code:                                  type     => stream,
                                   protocol => tcp,
                                   recv     => Recv},
                     ok = sc_receive_response_remote_close_tcp(InitState)
             end).
  
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  sc_receive_response_remote_close_tcp(_InitState) ->
      ok.
  
  
  
negative.code: %% git the setup anyway.
  %% Socket is IPv6.
  
  sc_lc_acceptor_response_tcp6(suite) ->
      [];
  sc_lc_acceptor_response_tcp6(doc) ->
      [];
  sc_lc_acceptor_response_tcp6(_Config) when is_list(_Config) ->
      tc_try(sc_lc_acceptor_response_tcp6,
             fun() ->
                     not_yet_implemented(),
                     InitState = #{domain   => inet,
                                   type     => stream,
                                   protocol => tcp},
                     ok = sc_lc_acceptor_response_tcp(InitState)
             end).
  
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  sc_lc_acceptor_response_tcp(_InitState) ->
      ok.
  
  
  