node h(z: bool; x, y: int) returns (o2: int)
  var o1, o: int;
  let
    (o1, o2) = if z then (1, 2) else (3, 4);
    o = 0 -> pre o + 2
  tel

node main() returns (o:int)
let
  o = h(false -> true, 0, 0)
tel