x/net/trace: Example has errors

[tv42]

        // A Fetcher fetches URL paths for a single domain.
    type Fetcher struct {
        domain string
        events *trace.EventLog
    }

That * was not meant to be there, pointers to interfaces are rare.

func (f *Fetcher) Fetch(path string) (string, error) {
    resp, err := http.Get("http://" + domain + "/" + path)

undefined: domain, should be f.domain

func (f *Fetcher) Fetch(path string) (string, error) {
...
    if err != nil {
        f.events.Errorf("Get(%q) = %v", path, err)
        return
    }

Needs to be return "", err

    f.events.Printf("Get(%q) = %s", path, resp.Code)

It's spelled StatusCode, but resp.Status is probably best for that.

Also needs to return something, or have ... there.

Same missing return in Fetcher.Close, add a return nil.

[dvyukov]

@ianlancetaylor This does not seem to be my trace, it is some other trace. Or why am I assigned?

[minux]

see #12364, we really need a mechanism to automatically assign
issues to package owners.

[gopherbot]

CL https://golang.org/cl/14014 mentions this issue.