Getting unexpected EOF with HTTP2 Transport

Question

Was trying out the http2 package in go, and while creating an HTTP2 connection I am getting an unexpected EOF error. Not able to figure out the exact issue.

    tcpConn, err := net.Dial("tcp", "clients1.google.com:443")
    if err != nil {
        panic(err)
    }
    defer tcpConn.Close()

    t := http2.Transport{}
    http2ClientConn, err := t.NewClientConn(tcpConn)
    if err != nil {
        panic(err)
    }

    req, err := http.NewRequest("GET", "https://clients1.google.com/generate_204", nil)
    if err != nil {
        panic(err)
    }

    resp, err := http2ClientConn.RoundTrip(req)
    if err != nil {
        panic(err) // getting unexpected EOF
    }

    defer resp.Body.Close()
    fmt.Println(resp.StatusCode)

Output

panic: unexpected EOF

goroutine 1 [running]:
main.main()
        /Users/rishabharya/Desktop/Projects/src/github.com/rishabh-arya95/raw_http/main.go:31 +0x217
exit status 2