w.WriteHeader(http.StatusOK)
	}))
	defer server.Close()
	tHost, tPortStr, err := net.SplitHostPort(server.Listener.Addr().String())
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}
	tPort, err := strconv.Atoi(tPortStr)
	if err != nil {
		t.Errorf("unexpected error: %v", err)
	}

	tests := []struct {
		host string
		port int

		expectedStatus probe.Result
		expectedError  error
	}{

	}
	if err != nil {
		return nil, fmt.Errorf("user: lookup username %s: %v", username, err)
	}
	return buildUser(&pwd), err
}

func lookupUserId(uid string) (*User, error) {
	i, e := strconv.Atoi(uid)
	if e != nil {
		return nil, e
	}
	return lookupUnixUid(i)
}

func lookupUnixUid(uid int) (*User, error) {
	var pwd _C_struct_passwd
	var found bool

			for i, t := range sampleTypes(p) {
				if t == dst {
					return i, nil
				}
			}
		}
		// By default select the last sample value
		return len(p.SampleType) - 1, nil
	}
	if i, err := strconv.Atoi(sampleIndex); err == nil {
		if i < 0 || i >= len(p.SampleType) {
			return 0, fmt.Errorf("sample_index %s is outside the range [0..%d]", sampleIndex, len(p.SampleType)-1)
		}
		return i, nil
	}

		if !sentInterrupt {
			// Simulate a ctrl-C on the keyboard by sending SIGINT
			// to the main test process and its parent.
			for _, pid := range strings.Split(pids, ",") {
				i, err := strconv.Atoi(pid)
				if err != nil {
					t.Fatal(err)
				}
				if p, err := os.FindProcess(i); err == nil {
					p.Signal(os.Interrupt)
					sentInterrupt = true // Only send interrupts once.
				}
			}
		}

// the given key and falls back to the given defaultValue if not set
func GetEnvAsIntOrFallback(key string, defaultValue int) (int, error) {
	if v := os.Getenv(key); v != "" {
		value, err := strconv.Atoi(v)
		if err != nil {
			return defaultValue, err
		}
		return value, nil
	}
	return defaultValue, nil
}

// GetEnvAsFloat64OrFallback returns the env variable (parsed as float64) for

// be allowed.
func NetLimit() (int, bool) {
	netLimitOnce.Do(func() {
		s := NetLimitGodebug.Value()
		if s == "" {
			return
		}

		n, err := strconv.Atoi(s)
		if err != nil {
			Fatalf("invalid %s: %v", NetLimitGodebug.Name(), err)
		}
		if n < 0 {
			// Treat negative values as unlimited.
			return
		}
		netLimitSem = make(chan struct{}, n)
	})

	// Get expected limit.
	limitRe := regexp.MustCompile(`nosplit stack over (\d+) byte limit`)
	m := limitRe.FindStringSubmatch(out)
	if m == nil {
		t.Fatalf("no overflow errors in output")
	}
	limit, _ := strconv.Atoi(m[1])

	wantMap := map[string]string{
		"main.startSelf": fmt.Sprintf(
			`main.startSelf<0>
    grows 1008 bytes
    %d bytes over limit
`, 1008-limit),
		"main.startChain": fmt.Sprintf(
			`main.startChain<0>

		return minVersion(z.X, -sign)
	case *TagExpr:
		if sign < 0 {
			// !foo implies nothing
			return -1
		}
		if z.Tag == "go1" {
			return 0
		}
		_, v, _ := strings.Cut(z.Tag, "go1.")
		n, err := strconv.Atoi(v)
		if err != nil {
			// not a go1.N tag
			return -1
		}
		return n
	}
}

// andVersion returns the minimum Go version
// implied by the AND of two minimum Go versions,

}

// IsNPathElement report whether pe is an index path element.
func IsNPathElement(pe string) bool {
	pe, ok := RemoveBrackets(pe)
	if !ok {
		return false
	}

	n, err := strconv.Atoi(pe)
	return err == nil && n >= InsertIndex
}

// PathKV returns the key and value string parts of the entire key/value path element.
// It returns an error if pe is not a key/value path element.

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