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go build has unexpected behavior #68042

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@FGYFFFF

Description

@FGYFFFF

Go version

go version go1.21.9 darwin/amd64

Output of go env in your module/workspace:

$ go env
GO111MODULE='on'
GOARCH='amd64'
GOBIN=''
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='darwin'
GOINSECURE=''
GOOS='darwin'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.google.cn'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/darwin_amd64'
GOVCS=''
GOVERSION='go1.21.9'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='clang'
CXX='clang++'
CGO_ENABLED='1'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'

What did you do?

i write a build tag for my code, like below:

.
├── a.go
├── a_a.go
├── a_test.go
└── go.mod

a.go
// note: i write wrong format for // +build

//go:build rgoinjec
// +build rgoinject
package test2

import "fmt"

func A() {
	fmt.Println("a")
}

a_a.go

package test2

import "fmt"

func A() {
	fmt.Println("a")
}

a_test.go

package test2

import "testing"

func TestA(t *testing.T) {
	A()
}
  • go build ./... build success
  • go test ./... test failed

What did you see happen?

I write the wrong format build tag for a.go. It will compile successfully by go build ./..., but it will fail by go test ./...
image

What did you expect to see?

I think go test & go build both to report the wrong format for my code.

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