Invalid URL not throwing a 404

[ericclemmons]

Which project does this relate to?

Start

Describe the bug

http://localhost:3000/not-found returns a 200, not a 400

Your Example Website or App

https://xoriwpjxoogithub-2brh--3001--134daa3c.local-credentialless.webcontainer.io/not-found

Steps to Reproduce the Bug or Issue

1. Start https://stackblitz.com/github/tanstack/router/tree/main/examples/react/quickstart-file-based?file=src/main.tsx
2. Navigate to an invalid URL (e.g. /not-found)
3. Server returns a 200

Expected behavior

Should return a 404.

Screenshots or Videos

Platform

• OS: macOS
• Browser: Arc Version 1.63.0 (54427), Chromium Engine Version 129.0.6668.90

Additional context

No response