route "//" does not result in a 404 page nor the index page

[mjarkk]

Bug report

Describe the bug

When visiting http://localhost:30000// i get a blank page with no error nor any route rendered.

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. Create a next.js project as described on the website: https://nextjs.org/learn/basics/getting-started/setup
2. Start the development server using: npm run dev or yarn dev
3. Visit http://localhost:30000//

Expected behavior

The 404 page

System information

• OS: Windows
• Browser: Chrome
• Version of Next.js: 9.3.2

[emiliskiskis]

404 appears for me.

[merelinguist]

Could not reproduce, got a 404 too:

• https://codesandbox.io/s/friendly-violet-369fp

• https://369fp.sse.codesandbox.io//

[timneutkens]

So what seems to happen is that when you go to // it loads up the 404 page (as expected) but does not remove the data-next-hide-fouc bit that prevents a FOUC when using CSS/SCSS imports support.

I can reproduce locally on a simple hello-world when going to http://localhost:3000//

[balazsorban44]

This issue has been automatically locked due to no recent activity. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.