Destructuring Inside an Async Function or Class Method Isn't Warned

[trisys3]

I added a GitHub repo illustrating the bug: trisys3/prop-types-async-issue.

Basically, when I have an async function, whether class method or a function by itself, and I destructure this.props, I am not warned about the props, even if they aren't in the prop-types. If I do have those props inside prop-types and I have the rule about unused prop-types on,

I found that if I use a destructured prop I stop getting warned about that prop being unused. This indicates that the bug is with the using, but not with the un-using, at least in classes.

This only applies to class methods, though. I never get warned about props in an async function declaration/statement, whether undeclared or unused, whether I use them or not, whether I declare them or not, or neither, or both. Also, this applies whether or not I'm destructuring. Basically, async functions seem un-implemented.

I tried to be as simple as possible. I added as few ESLint rules & plugins as I needed to illustrate the issue, and I didn't even add babel, though I did add babel-eslint. I also tried to be short & succinct with my function/variable/class names, though I may have been a little too cute. If you're still confused, please tell me.

[ljharb]

Fixed in #1939.