cmd/go: go install -v -i ... hangs indefinitely with Go 1.15.1 but not 1.13.4

[bullet45]

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

$ go version
go version go1.15.1 windows/amd64

Does this issue reproduce with the latest release?

yes

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

go env Output

$ go env
set GO111MODULE=
set GOARCH=amd64
set GOBIN=C:\Google\GOPATH\bin
set GOCACHE=C:\Users\Will2010\AppData\Local\go-build
set GOENV=C:\Users\Will2010\AppData\Roaming\go\env
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Google\GOPATH\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Google\GOPATH
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Google\Go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=C:\Google\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\Will2010\AppData\Local\Temp\go-build443042886=/tmp/go-build -gno-record-gcc-switches

What did you do?

In Powershell
go get -v -u gopkg.in/couchbase/gocb.v2

Then I tried
go get -v -u -d gopkg.in/couchbase/gocb.v2
and all packages were downloaded and cursor returned successfully

go install -v -i ...
Hangs indefinitely

What did you expect to see?

download and install packages

What did you see instead?

hangs after download

[davecheney]

Is there any anti virus or firewall software that may be interfering?

[bullet45]

I looked and I don't think so. Plus, I ended up going back a couple versions to
go1.13.4.windows-amd64.msi

And I have NO problems now. Everything is working successfully now including install with go get ...
So I have to believe it is an issue with
go version go1.15.1 windows/amd64
and
go1.15.1.windows-amd64.msi

[dmitshur]

go install -v -i ... means to install packages matching the import path pattern ..., which matches all packages. Is that what you were trying to do, or did you mean to install fewer packages (perhaps just the ones in a specific project)?

Maybe it matched many packages and was taking a long time to install them. What was CPU usage? What happens if you run go list ...?

Edit: Or was it go get -v -u gopkg.in/couchbase/gocb.v2 that hung? It's a little hard to tell. Can you please clarify what's the smallest set of commands that reproduces the issue, and provide complete output?

/cc @bcmills @jayconrod @matloob per owners.

[cherrymui]

Maybe related to #36492 ? Could you try setting environment variable GODEBUG=asyncpreemptoff=1 ?

[bullet45]

This is a brand new install on a new laptop and yes I meant to "install" all of the packages I got. (...)
At any rate, I'm working on 1.13 now - and don't have time to debug this. I'll upgrade again with a newer version later. This ticket may be closed.