proxy.golang.org: invalid pseudo-version: does not match version-control timestamp

[DazWilkin]

What version of Go are you using (go version)?

I'm using a build server (Google Cloud Build) and golang:1.12.7-buster

Does this issue reproduce with the latest release?

Yes, confident that it's proxy related

What did you do?

For the purposes of testing, artificially constrained:
go.mod:

module ${MODULE}

go 1.12

require (
	github.com/google/trillian v1.3.0
)

What did you expect to see?

Successful build; this happens if I set the build's GOPROXY=direct

What did you see instead?

Failed build; this happens if I set the build's GOPROXY=https://proxy.golang.org and

google.golang.org/genproto@v0.0.0-20170818100345-ee236bd376b0: unexpected status (https://proxy.golang.org/google.golang.org/genproto/@v/v0.0.0-20170818100345-ee236bd376b0.info): 410 Gone
mvdan.cc/unparam@v0.0.0-20190124213536-fbb59629db34: unexpected status (https://proxy.golang.org/mvdan.cc/unparam/@v/v0.0.0-20190124213536-fbb59629db34.info): 410 Gone
github.com/golangci/ineffassign@v0.0.0-20180808204949-42439a7714cc: unexpected status (https://proxy.golang.org/github.com/golangci/ineffassign/@v/v0.0.0-20180808204949-42439a7714cc.info): 410 Gone
github.com/golangci/gosec@v0.0.0-20180901114220-66fb7fc33547: unexpected status (https://proxy.golang.org/github.com/golangci/gosec/@v/v0.0.0-20180901114220-66fb7fc33547.info): 410 Gone
github.com/golangci/go-tools@v0.0.0-20180109140146-af6baa5dc196: unexpected status (https://proxy.golang.org/github.com/golangci/go-tools/@v/v0.0.0-20180109140146-af6baa5dc196.info): 410 Gone
github.com/golangci/errcheck@v0.0.0-20181003203344-ef45e06d44b6: unexpected status (https://proxy.golang.org/github.com/golangci/errcheck/@v/v0.0.0-20181003203344-ef45e06d44b6.info): 410 Gone
github.com/golangci/lint-1@v0.0.0-20180610141402-ee948d087217: unexpected status (https://proxy.golang.org/github.com/golangci/lint-1/@v/v0.0.0-20180610141402-ee948d087217.info): 410 Gone
github.com/go-critic/go-critic@v0.0.0-20181204210945-1df300866540: unexpected status (https://proxy.golang.org/github.com/go-critic/go-critic/@v/v0.0.0-20181204210945-1df300866540.info): 410 Gone
github.com/russross/blackfriday/v2@v2.0.1+incompatible: unexpected status (https://proxy.golang.org/github.com/russross/blackfriday/v2/@v/v2.0.1+incompatible.info): 410 Gone
github.com/golangci/gofmt@v0.0.0-20181105071733-0b8337e80d98: unexpected status (https://proxy.golang.org/github.com/golangci/gofmt/@v/v0.0.0-20181105071733-0b8337e80d98.info): 410 Gone

Which appear to (all) be:

invalid pseudo-version: does not match version-control timestamp

This may indeed be accurate but my solution is to avoid using the proxy :-(

[bcmills]

See https://tip.golang.org/doc/go1.13#version-validation for workarounds.

[bcmills]

Duplicate of #32805