anchor.diff:  
     42    = 'clojerl.Var':get(Var),
   
  -  {comments, ""}.
  +  Hash  = 'clojerl.IHash':hash(Var),
  +  Hash  = 'clojerl.IHash':hash(Var),
  +  true  = erlang:is_integer(Hash),
  +
  +  {comments, ""}.
  
positive.code:         , 'forty-two'/1
          , 'forty-two'/2
          , 'forty-three'/2
          ]).
  
  -export([ deref/1
  
negative.code:   Name2 = <<"forty-three">>,
    Var1  = 'clojerl.Var':new(Ns, Name2),
    ok = try clj_core:deref(Var1), error
         catch _:_ -> ok
         end,
  
    ct:comment("Try to deref an existing var"),
    Name3 = <<"forty-four">>,
    Var2  = 'clojerl.Var':new(Ns, Name3),
    ok = try clj_core:deref(Var2), error
         catch _:_ -> ok
         end,
  
  