-- lang-41 side defect 2: storing `d.tags` into another record used to
-- compile to a silent alias — `d` still owned the multi, so both records
-- dropped it (a double free the poisoned header now aborts on). A
-- projection at a transfer site is WO-E305; the Text field is exempt
-- because SETF copies it.
class D {
  name: Text
  tags: multi Text
}
class Out {
  label: Text
  tags: multi Text
}
fn build() -> Out {
  let d = D { name: "alpha", tags: ["t1", "t2"] }
  return Out { label: d.name, tags: d.tags }
}
fn main() {
  let o = build()
  print(o.label)
}