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 {key, customHooks} = signature;
    let forceReset = hasForceResetComment(scope.path);
    let customHooksInScope = [];
    customHooks.forEach(callee => {
      
      let bindingName;
      switch (callee.type) {
        case 'MemberExpression':
          if (callee.object.type === 'Identifier') {
            bindingName = callee.object.name;
          }
          break;
        case 'Identifier':
          bindingName = callee.name;
          break;
      }
      if (scope.hasBinding(bindingName)) {
        customHooksInScope.push(callee);
      } else {