-- iteration 24: no hangs, ever. A receive that traps kills the ACTOR:
-- the parked caller is error-unparked into a catchable WO_T_ACTOR
-- (callee died mid-call), and a later call to the same address traps
-- immediately (call-to-dead). The runtime prints the fiber-trap report
-- to stderr; stdout carries only the caller's side.
class Q {
  n: Int
}

class Bomb {
  fn receive(msg: Q) -> Int {
    return msg.n / (msg.n - msg.n);   -- DIV0: the actor dies mid-call
  }
}

fn call_one(b: actor Q, n: Int) -> Text {
  let r = call(b, Q { n: n });
  return "replied ${r}";
}

fn main() -> Int {
  let b: actor Q = spawn Bomb {};
  let first = try call_one(b, 7) catch (e) e.msg;
  print("mid-call: ${first}");
  let second = try call_one(b, 8) catch (e) e.msg;
  print("to-dead: ${second}");
  return 0;
}