}

		if len(line) > 0 && len(line)%2 == 0 {
			ifc.HardwareAddr = make([]byte, len(line)/2)
			var ok bool
			for i := range ifc.HardwareAddr {
				j := (i + 1) * 2
				ifc.HardwareAddr[i], ok = xtoi2(line[i*2:j], 0)
				if !ok {
					ifc.HardwareAddr = ifc.HardwareAddr[:i]
					break
				}
			}
		}

		ifc.Flags = FlagUp | FlagRunning | FlagBroadcast | FlagMulticast
	} else {

			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>

}

// 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.

		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,

#include <sys/select.h>

#include "libgo2.h"

int *nilp;

int main(int argc, char** argv) {
	int verbose;
	int test;

	if (argc < 2) {
		printf("Missing argument\n");
		return 1;
	}

	test = atoi(argv[1]);

	verbose = (argc > 2);

	Noop();

	switch (test) {
		case 1: {
			if (verbose) {
				printf("attempting segfault\n");
			}

			*nilp = 0;
			break;
		}

		case 2: {

	_, err = io.ReadFull(r, hdr)
	if err != nil {
		return
	}
	// leave for debugging
	if false {
		fmt.Printf("header: %s", hdr)
	}
	s := strings.TrimSpace(string(hdr[16+12+6+6+8:][:10]))
	size, err = strconv.Atoi(s)
	if err != nil || hdr[len(hdr)-2] != '`' || hdr[len(hdr)-1] != '\n' {
		err = fmt.Errorf("invalid archive header")
		return
	}
	name = strings.TrimSpace(string(hdr[:16]))
	return
}