Function thrower

deps/v8/test/mjsunit/es8/async-await-basic.js:195–195

(e)

  () => (async e => { throw new MyError(e) })("boom!!"), MyError, "boom!!");
assertThrowsAsync(
  () => ({ async thrower(e) { throw new MyError(e); } }).thrower("boom!1!"),
  MyError, "boom!1!");
assertThrowsAsync(
  () => AsyncFunction("msg", "throw new MyError(msg)")("boom!2!!"),