)

func TestNoAllocs(t *testing.T) {
	// Wrappers that panic on error, to prove that our alloc-free
	// methods are returning successfully.
	panicIP := func(ip Addr, err error) Addr {
		if err != nil {
			panic(err)
		}
		return ip
	}
	panicPfx := func(pfx Prefix, err error) Prefix {
		if err != nil {
			panic(err)
		}
		return pfx
	}

// This is used to try hard to get a panic stack trace out when exiting.
var runningPanicDefers atomic.Uint32

// panicking is non-zero when crashing the program for an unrecovered panic.
var panicking atomic.Uint32

// paniclk is held while printing the panic information and stack trace,
// so that two concurrent panics don't overlap their output.
var paniclk mutex

		yield := func(v1 V) bool {
			if done {
				return false
			}
			if !yieldNext {
				panic("iter.Pull: yield called again before next")
			}
			yieldNext = false
			v, ok = v1, true
			race.Release(unsafe.Pointer(&racer))
			coroswitch(c)
			race.Acquire(unsafe.Pointer(&racer))
			return !done
		}
		// Recover and propagate panics from seq.
		defer func() {
			if p := recover(); p != nil {
				panicValue = p

	if f == 0 {
		panic(&ValueError{valueMethodName(), Invalid})
	}
	// Assignable if addressable and not read-only.
	if f&flagRO != 0 {
		panic("reflect: " + valueMethodName() + " using value obtained using unexported field")
	}
	if f&flagAddr == 0 {
		panic("reflect: " + valueMethodName() + " using unaddressable value")
	}
}

// Addr returns a pointer value representing the address of v.

}

// Int64 returns v's value as an int64. It panics
// if v is not a signed integer.
func (v Value) Int64() int64 {
	if g, w := v.Kind(), KindInt64; g != w {
		panic(fmt.Sprintf("Value kind is %s, not %s", g, w))
	}
	return int64(v.num)
}

// Uint64 returns v's value as a uint64. It panics
// if v is not an unsigned integer.
func (v Value) Uint64() uint64 {

// It panics if n <= 0.
func (r *Rand) Int64N(n int64) int64 {
	if n <= 0 {
		panic("invalid argument to Int64N")
	}
	return int64(r.uint64n(uint64(n)))
}

// Uint64N returns, as a uint64, a non-negative pseudo-random number in the half-open interval [0,n).
// It panics if n == 0.
func (r *Rand) Uint64N(n uint64) uint64 {
	if n == 0 {
		panic("invalid argument to Uint64N")
	}

	//	t.IsVariadic() == true
	//
	// IsVariadic panics if the type's Kind is not Func.
	IsVariadic() bool

	// Elem returns a type's element type.
	// It panics if the type's Kind is not Array, Chan, Map, Pointer, or Slice.
	Elem() Type

	// Field returns a struct type's i'th field.
	// It panics if the type's Kind is not Struct.
	// It panics if i is not in the range [0, NumField()).
	Field(i int) StructField

		m.Value = Value{kind: ValueUint64, scalar: e.base.args[0]}
	default:
		panic(fmt.Sprintf("internal error: unexpected event type for Metric kind: %s", go122.EventString(e.base.typ)))
	}
	return m
}

// Label returns details about a Label event.
//
// Panics if Kind != EventLabel.
func (e Event) Label() Label {
	if e.Kind() != EventLabel {
		panic("Label called on non-Label event")
	}
	if e.base.typ != go122.EvGoLabel {

//
// r.Kind must be ResourceGoroutine or this function will panic.
func (r ResourceID) Goroutine() GoID {
	if r.Kind != ResourceGoroutine {
		panic(fmt.Sprintf("attempted to get GoID from %s resource ID", r.Kind))
	}
	return GoID(r.id)
}

// Proc obtains a ProcID from the resource ID.
//
// r.Kind must be ResourceProc or this function will panic.
func (r ResourceID) Proc() ProcID {
	if r.Kind != ResourceProc {

func Add(h Hook) {
	for !locked.CompareAndSwap(0, 1) {
		Gosched()
	}
	hooks = append(hooks, h)
	locked.Store(0)
}

// Run runs the exit hooks.
//
// If an exit hook panics, Run will throw with the panic on the stack.
// If an exit hook invokes exit in the same goroutine, the goroutine will throw.
// If an exit hook invokes exit in another goroutine, that exit will block.
func Run(code int) {