datastore: protobuf namespace conflict with google.golang.org/appengine/v2 #10155
Description
Client
datastore
Environment
Go executable on Linux
Go Environment
$ go version
go version go1.22.3 linux/amd64$ go env
GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/home/vscode/.cache/go-build'
GOENV='/home/vscode/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='local'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.3'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/workspaces/namespace-conflict/go.mod'
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 -ffile-prefix-map=/tmp/go-build3064827702=/tmp/go-build -gno-record-gcc-switches'Code
package main
import (
"fmt"
_ "cloud.google.com/go/datastore"
_ "google.golang.org/appengine/v2"
)
func main() {
fmt.Println("Hello, World!")
}Expected behavior
Hello, World! will be displayed.
Actual behavior
A panic will occur.
$ go run main.go
panic: proto: file "datastore_v3.proto" is already registered
previously from: "cloud.google.com/go/datastore/internal/gaepb"
currently from: "google.golang.org/appengine/v2/internal/datastore"
See https://protobuf.dev/reference/go/faq#namespace-conflict
goroutine 1 [running]:
google.golang.org/protobuf/reflect/protoregistry.init.func1({0x101aa60?, 0xabafe0?}, {0xba6a80, 0xc000036ee0})
/go/pkg/mod/google.golang.org/protobuf@v1.34.1/reflect/protoregistry/registry.go:56 +0x1ec
google.golang.org/protobuf/reflect/protoregistry.(*Files).RegisterFile(0xc0000122e8, {0xbb48a0, 0xc00019ee00})
/go/pkg/mod/google.golang.org/protobuf@v1.34.1/reflect/protoregistry/registry.go:130 +0xbc3
google.golang.org/protobuf/internal/filedesc.Builder.Build({{0x97faf0, 0x31}, {0xff81e0, 0x2d00, 0x2d00}, 0xc, 0x37, 0x0, 0x0, {0xbab380, ...}, ...})
/go/pkg/mod/google.golang.org/protobuf@v1.34.1/internal/filedesc/build.go:112 +0x1d6
google.golang.org/protobuf/internal/filetype.Builder.Build({{{0x97faf0, 0x31}, {0xff81e0, 0x2d00, 0x2d00}, 0xc, 0x37, 0x0, 0x0, {0x0, ...}, ...}, ...})
/go/pkg/mod/google.golang.org/protobuf@v1.34.1/internal/filetype/build.go:138 +0x17d
google.golang.org/appengine/v2/internal/datastore.file_datastore_v3_proto_init()
/go/pkg/mod/google.golang.org/appengine/v2@v2.0.6/internal/datastore/datastore_v3.pb.go:6420 +0x1b8
google.golang.org/appengine/v2/internal/datastore.init.0()
/go/pkg/mod/google.golang.org/appengine/v2@v2.0.6/internal/datastore/datastore_v3.pb.go:5739 +0xf
exit status 2Additional context
Importing google.golang.org/appengine/v2 with datastore v1.16.0 or later causes a protobuf namespace conflict.