Bug: HOC (memo/forwardRef) should throw for noop function

[ambar]

React version: v16

Steps To Reproduce

import React from "react";

export const Q = React.memo(() => {});
export const Z = React.forwardRef(() => {});

export default function App() {
  return (
    <>
      <Q />
      <Z />
    </>
  );
}

Link to code example: https://codesandbox.io/s/hoc-throw-null-xrhwg

The current behavior

No errors.

The expected behavior

Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.

[bvaughn]

Thanks for the report.