goproxytest doesn't support 1.13 cmd/go

[josharian]

Reproduce:

Run the gohack tests using Go 1.13.

Result:

Lots of test failures. The interesting parts look like:

            go get rsc.io/sampler@v1.2.1: rsc.io@v1.2.1: reading http://127.0.0.1:60141/mod/rsc.io/@v/v1.2.1.info: 500 Internal Server Error

The tests pass with Go 1.12. A cursory glance at the cmd/go source suggests goproxytest changed significantly during Go 1.13, I think for sumdb support in cmd/go.

[mvdan]

Interesting... I've been using testscript with goproxytest in a couple of projects, and I've never run into this error with 1.13 or tip. For what it's worth, go test ./... on go-internal master passes for me with 1.13.1.

[mvdan]

gohack master did fail on 1.13, but go get github.com/rogpeppe/go-internal@latest fixed it for me by upgrading to v1.4.

[josharian]

Indeed! Silly me. Thanks, I'll send a PR to gohack.

(Unfortunately, goproxytest still doesn't support .../@v/list urls, but that's a different matter.)