anchor.diff:          [] ->
               register(Name, val, Value, Pid),
               {reply, true, State};
  -        [{_, Pid}|_] -> 
  -            {reply, {false, Pid}, State}
  +        [{_, OldPid}|_] -> 
  +            {reply, {false, OldPid}, State}
       end;
   
   handle_call({wait_reg, Name, Value, Pid}, {FromPid, FromRef}, State) ->
  
positive.code: %% ===================================================================
  
  
  -ifdef(TEST).
  -compile({no_auto_import, [put/2]}).
  -include_lib("eunit/include/eunit.hrl").
  
negative.code: %% -------------------------------------------------------------------
  %%
  %% Copyright (c) 2014 Carlos Gonzalez Florido.  All Rights Reserved.
  %%
  