anchor.diff:  
   -export([all/0, suite/0]).
   -export([wrap_1/1]).
  +-export([compare_list/1, compare_ets/1]).
   
   -export([loop_ref/1]).
   
  
positive.code: loop_ref(R, R, _) -> ok;
  loop_ref(R0, _, N) ->
      loop_ref(R0, make_ref(), N+1).
  
negative.code:      {timetrap, {minutes, 2}}].
  
  all() -> 
      [wrap_1, compare_list, compare_ets].
  
  %% Check that refs don't wrap around easily.
  wrap_1(Config) when is_list(Config) ->
  