(* pour debugger
   set arguments -v test/good/t9.ept *)

node f(x,z:int) returns (o1,o2:int)
  let
    switch (x = z)
      | true var o'1: int; o'2: int;
             do (o'1, o'2) = (1, 2); o1 = o'1; o2 = o'2;
      | false do (o2, o1) = (3, 3);
    end
  tel