What is the URL of the page with the issue?

https://pkg.go.dev/github.com/google/go-containerregistry@v0.4.1/pkg/v1/

What is your user agent?

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Screenshot

What did you do?

I added a trailing / to the URL https://pkg.go.dev/github.com/google/go-containerregistry@v0.4.1/pkg/v1

What did you expect to see?

I expected to see it succeed and show documentation.

What did you see instead?

400 Bad Request

This seems potentially related to #43979, at least insofar as it's another bug with handling trailing slashes.

In general it's probably fine to just remove trailing slashes and handle the request the same, or even just redirect to the trailing-slashless URL

These both work:

• https://pkg.go.dev/github.com/google/go-containerregistry/pkg/v1/
• https://pkg.go.dev/github.com/google/go-containerregistry@v0.4.0/
• https://pkg.go.dev/github.com/google/go-containerregistry@v0.4.0/pkg

This doesn't:

• https://pkg.go.dev/github.com/google/go-containerregistry@v0.4.0/pkg/

So it seems like it's specific to handling sub-packages in a module where the version is included in the URL.