(* This fails: the nodes should be declared as "unsafe" (because of side effect) *)
node hello() returns (b:bool)
let
  () = Iostream.printf("hello\n");
  automaton
  state A do
    b = true;
    () = Iostream.printf("hello\n");
  end;
tel

node main() returns ()
var b:bool;
let
   b = hello();
tel