anchor.diff:  
   uniform() ->
       {X, Seed} = uniform_s(seed()),
  -    seed_put(Seed),
  +    _ = seed_put(Seed),
       X.
   
   %% uniform/1: given an integer N >= 1,
  
positive.code: 
  uniform(N) ->
      {X, Seed} = uniform_s(N, seed()),
      seed_put(Seed),
      X.
  
  %% uniform_s/1: given a state, uniform_s/1
  
negative.code: -define(DEFAULT_ALG_HANDLER, as183).
  -define(SEED_DICT, random_seed).
  
  -record(alg, {seed0 :: fun(), seed :: fun(),
                  uniform :: fun(), uniform_n :: fun()}).
  
  %% =====================================================================
  %% Types
  