Crash with v14.3.3 and newer with Gatsby

I'm having a weird issue with react-element-to-jsx-string and Gatsby with the latest version.

This will crash the browser with 14.3.4, but works in 14.3.2.

Only happens inside Gatsby page in develop mode. Any ideas?

```tsx
import React from 'react'
import reactElementToJSXString from 'react-element-to-jsx-string'

const Foo = () =>

// ^- causes the crash

const Page = () => <>{reactElementToJSXString(Foo())}

export default Page
```

Reproduction: https://github.com/tu4mo/gatsby-retjs-issue