Master fails to build due to github.com/pingcap/tidb

[coadler]

See pingcap/tidb#18584

$ go build ./...
go: github.com/pingcap/tidb@v1.1.0-beta.0.20200526100040-689a6b6439ae requires
	github.com/pingcap/br@v0.0.0-20200521085655-53201addd4ad requires
	github.com/pingcap/tidb@v1.1.0-beta.0.20200509133407-a9dc72cf2558 requires
	github.com/pingcap/pd/v4@v4.0.0-rc.1.0.20200422143320-428acd53eba2: invalid pseudo-version: revision 428acd53eba2 is not a descendent of preceding tag (v4.0.0-rc.1)

Reverting to github.com/pingcap/tidb v1.1.0-beta.0.20200426094148-df4c9f05c49c which was present in the v1.4 release fixes it.

[kyleconroy]

I can't reproduce this bug. Running go build ./... on my local machine works. CI on the master branch is also working. Any idea why my build works and your build doesn't? Maybe because I have some packages cached?

[coadler]

Here's a rundown of what happens on my machine

$ go version
go version go1.14.3 linux/amd64

$ git --no-pager log -1
commit ba09fa0f23672853925e906a432af3ae93f0b71c (HEAD -> master, origin/master, origin/HEAD)
Author: Daniel Atwood <daniel@atwood.io>
Date:   Tue Jul 21 13:06:08 2020 -0400

    Fixed :execresult generation (#597)

$ go build ./...
go: github.com/pingcap/tidb@v1.1.0-beta.0.20200526100040-689a6b6439ae requires
	github.com/pingcap/br@v0.0.0-20200521085655-53201addd4ad requires
	github.com/pingcap/tidb@v1.1.0-beta.0.20200509133407-a9dc72cf2558 requires
	github.com/pingcap/pd/v4@v4.0.0-rc.1.0.20200422143320-428acd53eba2: invalid pseudo-version: revision 428acd53eba2 is not a descendent of preceding tag (v4.0.0-rc.1)

$ go get github.com/pingcap/tidb@master
go: github.com/pingcap/tidb@v1.1.0-beta.0.20200526100040-689a6b6439ae requires
	github.com/pingcap/br@v0.0.0-20200521085655-53201addd4ad requires
	github.com/pingcap/tidb@v1.1.0-beta.0.20200509133407-a9dc72cf2558 requires
	github.com/pingcap/pd/v4@v4.0.0-rc.1.0.20200422143320-428acd53eba2: invalid pseudo-version: revision 428acd53eba2 is not a descendent of preceding tag (v4.0.0-rc.1)

I was able to fix this by downgrading to the version used in the v1.4 release (coadler@1d003ba). I believe what happened was pingcap/pd unpublished a version that pingcap/tidb was depending on. Since you have it cached go mod doesn't try to refetch.

[kyleconroy]

Since you have it cached go mod doesn't try to refetch.

Yep, that's what I guessed. I'll go ahead and downgrade