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

go version go1.20rc1 darwin/arm64

What did you do?

Pasted a HTTP ResponseController usage example from Go 1.20 release notes draft:

package pkg

import (
	"io"
	"net/http"
	"strings"
)

func RequestHandler(w http.ResponseWriter, r *http.Request) {
	rc := http.NewResponseController(w)
	rc.SetWriteDeadline(0) // disable Server.WriteTimeout when sending a large response
	io.Copy(w, strings.NewReader("hello"))
}

https://go.dev/play/p/F16HmEJ7NUU

What did you expect to see?

No build errors.

What did you see instead?

Incorrect http.ResponseController.SetWriteDeadline call — it's called with an int constant, when this method expects time.Time type.

¶ go vet
# pkg
vet: ./pkg.go:11:22: cannot use 0 (untyped int constant) as time.Time value in argument to rc.SetWriteDeadline