Typescript type error when running a configuration similar to custom-server-typescript example

Bug report

Describe the bug

After upgrading to Next 9.4, I was having an issue with what seems like Typescript reporting an error in my custom TS server project:

TypeError: Cannot read property 'kind' of undefined

The logging is a bit noisy, but compilation is successful.

To Reproduce

This issue could be reproduced by just running the official nextjs custom-server-typescript example here: https://github.com/zeit/next.js/tree/canary/examples/custom-server-typescript

essentially curl the example, cd into the directory, npm install && npm run dev, visit localhost:3000

Expected behavior

Should compile without any errors.

System information

• OS: macOS 10.15.4
• Version of Next.js: 9.4.0
• Version of Node.js: 10.16.3

Additional context

Add any other context about the problem here.

[dakotaJang]

This problem still persists.

{
  "dependencies": {
    "next": "9.5.1",
    "typescript": "^3.9.7"
  }
}

@Timer, why is this issue closed? Is it being tracked on different issue?

[dandrei]

I confirm that the problem is still present with TS 3.9.3 and Next.js 9.4.2. Latest working configuration still uses TS 3.8.3.