anchor.diff:      %% Stop cover on the node, then terminate the node
       cover:stop(N1),
       rpc:call(N1,erlang,halt,[]),
  -    [] = cover:which_nodes(),
  +    cover_which_nodes([]),
   
       check_f_calls(1,0),
   
  
positive.code: 
  check_f_calls(F1,F2) ->
      {ok,[{{f,f1,0},F1},{{f,f2,0},F2}|_]} = cover:analyse(f,calls,function).
  
negative.code:     {ok,b} = cover:compile(b),
      cover_compiled = code:which(b),
  
      cover_which_nodes([]),
      check_f_calls(1,0), % only the first call - before the flush
  
      %% Reconnect the node and check that b and f are cover compiled but not a
  