data DlqEntry

@error data Rejected { why: str }

fn moderate(n: i32) -> i32 | Rejected {
  if n % 2 == 1 { fail Rejected{ why: "odd" } }
  n
}

pipeline photo(n: i32) -> i32 {
  respond it
  -> moderate
  -> moderate
}

fn main() io, net, time, db {
  let _ = photo(3)
  sleep(300ms)
  for e in std.saga.dlqList("main.photo") {
    print("{e.pipe}: {e.step}: {e.error}")
  }
}

main.photo: 2: moderate: Rejected{why: "odd"}