// async-spawn-instance smoke
// Create an ArrayBox with 3 elements, then spawn length() asynchronously
// and await the future. Expect 3.

static box Main {
  main() {
    local arr = new ArrayBox()
    arr.push(1)
    arr.push(2)
    arr.push(3)
    nowait fut = arr.length()
    local result = await fut
    return result
  }
}