File: 4.sml

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mlton 20130715-3
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(* This code has a handler which is provably unreachable. *)

fun f(n: int): int list =
   if n = 0
      then []
   else
      let val x = f(n - 1)
      in [13] handle e => (hd x + 1; raise e)
      end

val _ = f 13