cmd/go2go: type parameter used in map key causes compile-time error

[CxdInitial]

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

$ go version
go version devel +8ea0120a21 Mon Aug 31 05:23:21 2020 +0000 linux/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
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/sutton/.cache/go-build"
GOENV="/home/sutton/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/sutton/go_path/pkg/mod"
GONOPROXY="*.qianxin-inc.cn"
GONOSUMDB="*.qianxin-inc.cn"
GOOS="linux"
GOPATH="/home/sutton/go_path"
GOPRIVATE="*.qianxin-inc.cn"
GOPROXY="https://goproxy.cn,direct"
GOROOT="/mnt/d/Projects/golang"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/mnt/d/Projects/golang/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/mnt/d/Projects/strongly_connected_components/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build875823548=/tmp/go-build -gno-record-gcc-switches"

What did you do?

package main

type Test[V comparable] struct {
        m map[V]map[V]struct{}
}

func NewTest[V comparable]() Test[V] {
        return Test[V] {
                make(map[V]map[V]struct{},
        }
}

func main() {
        _ = NewTest()
}

What did you expect to see?

No error.

What did you see instead?

prog.go2:10:9: expected operand, found '}' (and 1 more errors)

[CxdInitial]

my bad