What is the URL of the page with the issue?
https://go.dev/blog/tidy-web
What is your user agent?
I browsed with Brave on Windows 10. The user agent string is the following
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36
What did you do?
Followed the first link in the first sentence of post https://go.dev/blog/tidy-web
What did you expect to see?
A new post
What did you see instead?
A page with an error.
Manually changing the URL from https://go.dev/blog/blog/go.dev to https://go.dev/blog/go.dev makes the linked post appear
Before manually editing (URL https://go.dev/blog/blog/go.dev)

After manually editing (URL https://go.dev/blog/go.dev)

What is the URL of the page with the issue?
https://go.dev/blog/tidy-web
What is your user agent?
I browsed with Brave on Windows 10. The user agent string is the following
What did you do?
Followed the first link in the first sentence of post https://go.dev/blog/tidy-web
What did you expect to see?
A new post
What did you see instead?
A page with an error.
Manually changing the URL from https://go.dev/blog/blog/go.dev to https://go.dev/blog/go.dev makes the linked post appear
Before manually editing (URL https://go.dev/blog/blog/go.dev)
After manually editing (URL https://go.dev/blog/go.dev)