#! stap

function f1 (a, b) {
  c = 1;
  d = "hello";
  # poo[c] = bab[d] = "hi"
  bab = "hi";
  bab = poo[c];
  return 0
} 

function f2 () {
  return f1 (4, "zoo");
}

global koo
global poo, bab

probe z {
  f2 ();
  koo = 1
}

probe x,y {
  f2 ();
  f1 (f1 (3, "foo"), "canoe")
}