cmd/go: get hangs indefinitely for go get -x -u ./...

[dpanic]

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

go version go1.20.4 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

GO111MODULE=""
GOARCH="amd64"
GOBIN="/home/dpanic/go/bin"
GOCACHE="/home/dpanic/.cache/go-build"
GOENV="/home/dpanic/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/dpanic/go/pkg/mod"
GONOPROXY="*.internal.mycompany.com"
GONOSUMDB="*.internal.mycompany.com"
GOOS="linux"
GOPATH="/home/dpanic/go"
GOPRIVATE="*.internal.mycompany.com"
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.20.4"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1976099889=/tmp/go-build -gno-record-gcc-switches"

What did you do?

go get -u ./...

What did you expect to see?

Finished go mod update

What did you see instead?

Stuck process

[seankhliao]

please provide a repo that reproduces the issue

[dpanic]

please provide a repo that reproduces the issue

@seankhliao here is replica of that repo https://github.com/dpanic/broken

I can't share original repo because of the NDA.

Let's say that:

• on new go.mod I don't have problem
• on old go.mod I have problem, and I have different go.sum (which could be okay)

I added go.mod.broken_one and go.sum.broken_one from the repo I can't share

[seankhliao]

cc @bcmills @matloob

[bcmills]

@dpanic, there is a known severe bug in go get (#55955). Could you try patching in https://go.dev/cl/471595 and see if that fixes your case too?

[bcmills]

Also, how long was the process stuck, and were there any open connections to proxy.golang.org or running git commands at the time?

[dpanic]

Also, how long was the process stuck, and were there any open connections to proxy.golang.org or running git commands at the time?

I let it run for 6h ... I did strace on process (I can do it again and share with you output if needed, it was constantly doing something, looked like dead loop to me).

No connections to proxy.golang.org at the time of process being stuck, nor before. No git commands either.

[dpanic]

https://go.dev/cl/471595

@dpanic, there is a known severe bug in go get (#55955). Could you try patching in https://go.dev/cl/471595 and see if that fixes your case too?

@bcmills tried, git clone than git checkout to branch which already has patch applied. compiled Go from scratch.

Something wrong with this version...Maybe I did something wrong, IDK.

[bcmills]

The missing GOSUMDB error comes from here:
https://cs.opensource.google/go/go/+/master:src/cmd/go/internal/modfetch/sumdb.go;l=80;drc=f229e7031a6efb2f23241b5da000c3b3203081d6

That suggests that the environment in which you are running go get does not match the go env output from the original issue report: that go env shows GOSUMDB="sum.golang.org", which should take the knownGOSUMDB path here:
https://cs.opensource.google/go/go/+/master:src/cmd/go/internal/modfetch/sumdb.go;l=75-77;drc=f229e7031a6efb2f23241b5da000c3b3203081d6

[dpanic]

@bcmills tnx, works when I set GOSUMDV:
GOSUMDB="sum.golang.org" /home/dpanic/Downloads/go/bin/go get -x -u ./...

This version of Go resolved my issue!

Thanks

[seankhliao]

Duplicate of #55955