* Fix syntax error from #4164
Function statements require a name.
See #4166
* Apply suggestions from code review
Co-authored-by: Jordan Harband <ljharb@gmail.com>
---------
Co-authored-by: Jordan Harband <ljharb@gmail.com>
There is no such hidden constructor, it's the same as the hidden
AsyncFunction constructor. In other words:
```js
Object.getPrototypeOf(async () => {}).constructor ===
Object.getPrototypeOf(async function () {}).constructor
```
Also add a test to ensure that %AsyncFunction.prototype% is indeed the
prototype of an async arrow function.
Closes#4044.
Philip Chimento
Paul Bakker
Linus Groh
Rick Waldron