Proposal: Warn on importing from a filename for which a directory also exists

For example, let's say I have the following files:

| something/
|-- index.js
| something.js
| main.js

Inside main.js, I have the following code:

import { helpfulFunction } from './something';

// do something with helpfulFunction()

This is a little dangerous, because did I mean ./something or ./something/? I don't think code should be split up like this—in this case, I would take the contents of something.js and move them to something/index.js and just import from there. A warning would be helpful to track down cases like this.