anchor.diff:                          case hyparview_membership_check(Nodes) of
                               {[], []} -> true;
                               {ConnectedFails, []} ->
  -                                {false, {connected_check_failed, ConnectedFails}};
  +                                {connected_check_failed, ConnectedFails};
                               {[], SymmetryFails} ->
  -                                {false, {symmetry_check_failed, SymmetryFails}};
  +                                {symmetry_check_failed, SymmetryFails};
                               {ConnectedFails, SymmetryFails} ->
  -                                {false, [{connected_check_failed, ConnectedFails},
  -                                         {symmetry_check_failed, SymmetryFails}]}
  +                                [{connected_check_failed, ConnectedFails},
  +                                 {symmetry_check_failed, SymmetryFails}]
                           end
                         end,
   
  
positive.code:                     ok = check_forward_message(Node, Manager)
                    end, Nodes),
  
      %% Stop nodes.
      stop(Nodes),
  
  
negative.code:     end.
  
  %% @private
  %% 
  %% Kill a random node and then return a list of nodes that still have the
  %% killed node in their membership
  %%
  hyparview_check_stopped_member(_, [_Node]) -> {undefined, []};
  hyparview_check_stopped_member(KilledNode, Nodes) ->
      %% Obtain the membership from all the nodes,
      %% the killed node shouldn't be there
      lists:filtermap(fun({_, Node}) ->
                          {ok, Members} = rpc:call(Node, partisan_peer_service, members, []),
                          case lists:member(KilledNode, Members) of
                              true ->
                                  {true, Node};
                              false ->
                                  false
                          end
                       end, Nodes).
  
  %% @private
  hyparview_membership_check(Nodes) ->
      Manager = partisan_hyparview_peer_service_manager,
      %% Create new digraph.
  