fn simple_reporter () -> {
  print! (self (), msgs ())
}

fn hanger () -> hanger ()

let foo = spawn! (hanger)
let bar = spawn! (simple_reporter)
let baz = spawn! (fn () -> panic! :oops)

send (foo, [:foo, :bar, :baz])
send (bar, (1, 2, 3))

yield! ()

:done