go build llvm failed

[chai2010]

package main

import (
	"fmt"

	_ "llvm.org/llvm/bindings/go/llvm"
)

func main() {
	fmt.Println("done")
}

$ go version
go version go1.12beta1 darwin/amd64
$ go build
go: finding llvm.org/llvm/bindings/go/llvm latest
go: finding llvm.org/llvm latest
go: downloading llvm.org/llvm v0.0.0-20181219144336-000000349630
build chai2010.cn/hello-llvm: cannot load llvm.org/llvm/bindings/go/llvm: ReadZip not implemented for svn
$ cat go.mod
module chai2010.cn/hello-llvm

go 1.12

[bcmills]

When filing issues, please fill out the entire issue template: for example, go env is relevant here.

[bcmills]

Duplicate of #26092.