Using `react-refresh/babel` 0.4.0 is giving me this error on a large number of files:

```
ERROR in ../orbit-app/src/hooks/useStores.ts
Module build failed (from ../node_modules/babel-loader/lib/index.js):
TypeError: Cannot read property '0' of undefined
    at Function.get (/Users/nw/projects/motion/orbit/node_modules/@babel/traverse/lib/path/index.js:115:33)
    at NodePath.unshiftContainer (/Users/nw/projects/motion/orbit/node_modules/@babel/traverse/lib/path/modification.js:191:31)
    at PluginPass.exit (/Users/nw/projects/motion/orbit/node_modules/react-refresh/cjs/react-refresh-babel.development.js:546:28)
```

I narrowed down that file to the simplest thing that causes it:

```
import { useContext } from 'react'

export default () => useContext()
```

_Originally posted by @natew in https://github.com/facebook/react/issues/16604#issuecomment-528708174_
const foundInside = findInnerComponents(
              innerName,
              firstArgPath,
              callback,
            );
            if (!foundInside) {
              return false;
            }
            
            
            callback(inferredName, node, path);
            return true;
          }
          default: {
            return false;
          }
        }
      }
      case 'VariableDeclarator': {
        const init = node.init;
        if (init === null) {
          return false;
        }
        const name = node.id.name;
        if (!isComponentishName(name)) {
          return false;
        }
        switch (init.type) {
          case 'ArrowFunctionExpression':
          case 'FunctionExpression':