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cmd/vet: stderr spam during testing #23146

bradfitz opened this issue Dec 15, 2017 · 3 comments

cmd/vet: stderr spam during testing #23146

bradfitz opened this issue Dec 15, 2017 · 3 comments


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@bradfitz bradfitz commented Dec 15, 2017

I'm seeing stderr spam on Windows running tests at master (at 9d5f8ea):

screen shot 2017-12-14 at 8 22 39 pm

This is in my Windows XP VM, if that matters.

/cc @rsc @ianlancetaylor

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@rajender rajender commented Dec 17, 2017

I can't reproduce it in windows 10.

C:\Users\rajender\go-contrib\go\src>go test -short -run="Cancel|Race" -count=100 os/exec
ok os/exec 7.981s

C:\Users\rajender\go-contrib\go\src>go version
go version devel +9d5f8eaa8a Fri Dec 15 02:48:35 2017 +0000 windows/amd64

C:\Users\rajender\go-contrib\go\src>go env
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\rajender\AppData\Local\go-build set GOEXE=.exe set GOHOSTARCH=amd64 set GOHOSTOS=windows set GOOS=windows
set GOPATH=C:\Users\rajender\go
set GOROOT=C:\Users\rajender\go-contrib\go
set GOTOOLDIR=C:\Users\rajender\go-contrib\go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set CXX=g++
set CGO_CFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:\Users\rajender\AppData\Local\Temp\go-build924340210=/tmp/go-build -gno-record-gcc-switches


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@ianlancetaylor ianlancetaylor commented Jan 3, 2018

I believe this error means that cmd/go has found some packages in the cache. It has told vet that those packages can be found in the cache. When vet goes to open them, it gets an error.

Looking at the file name, it's weird that it's a relative path. The relevant code is in cmd/go/internal/cache/default.go. On Windows, if GOCACHE is not set in the environment, it uses a subdirectory go-build of whatever is returned by os.Getenv("LocalAppData"). I imagine that in the failing case that environment variable was not set.

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@gopherbot gopherbot commented Jan 3, 2018

Change mentions this issue: cmd/go: on Windows, disable cache if LocalAppData is not set

@gopherbot gopherbot closed this in ce94c0a Jan 3, 2018
@golang golang locked and limited conversation to collaborators Jan 3, 2019
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