anchor.diff:  
           {'prop:numtests', Iters, Property} ->
               check_input(fun(none)->Property end,none,none,
  -                        QCT#triq{size=Iters});
  +                        QCT#triq{ run_iter=Iters });
   
           {'prop:whenfail', Action, Fun2, Body2} ->
               case check_input(fun(none)->Fun2()end,none,none,
  
positive.code: 
  -record(triq, {count=0,
                 context=[],
                 size=?TEST_COUNT,
                 report= fun report_none/2,
                 shrinking= false,
                 result=undefined,
  
negative.code:     case check_input(fun(nil)->Property end,
                       nil,
                       nil,
                       #triq{report=fun report/2, run_iter=RunIters,
                             values=Counterexample}) of
  
          {failure, Fun, Input, InputDom, #triq{count=Count,context=Ctx,
  