"uTLS does not support 0x0 as min version" with tls.HelloRandomized

[AxbB36]

I'm using utls commit b84d7d5. Running this program:

package main

import (
	"fmt"
	"os"
	"net"

	tls "github.com/refraction-networking/utls"
)

func run() error {
	conn, err := net.Dial("tcp", "tlsfingerprint.io:443")
	if err != nil {
		return err
	}
	uconn := tls.UClient(conn, nil, tls.HelloRandomized)
	uconn.SetSNI("tlsfingerprint.io")
	return uconn.Handshake()
}

func main() {
	err := run()
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}

Fails with the error message:

uTLS does not support 0x0 as min version

It also happens with HelloRandomizedALPN and HelloRandomizedNoALPN. It doesn't happen with HelloChrome_70 and HelloFirefox_63.

[AxbB36]

I see the same error message from running examples/examples.go. (I had to update requestAddr := "tlsfingerprint.io:443" first.)

#> HttpGetDefault response: HTTP/1.1 200 OK
#> HttpGetByHelloID(HelloChrome_62) response: HTTP/1.1 200 OK
#> HttpGetByHelloID(Randomized) failed: uTlsConn.Handshake() error: uTLS does not support 0x0 as min version
...
#> HttpGetExplicitRandom response: HTTP/1.1 200 OK
...
#> HttpGetTicket response: HTTP/1.1 200 OK
...
#> HttpGetTicketHelloID(HelloFirefox_56) response: HTTP/1.1 200 OK
#> HttpGetCustom() failed: uTlsConn.Handshake() error: uTLS does not support 0x0 as min version
#> HttpGetGoogleWithRoller() response: HTTP/2.0 200 OK
#> HttpGetGoogleWithRoller() response: HTTP/2.0 200 OK
#> HttpGetGoogleWithRoller() response: HTTP/2.0 200 OK
#> HttpGetGoogleWithRoller() response: HTTP/2.0 200 OK
#> HttpGetGoogleWithRoller() response: HTTP/2.0 200 OK