func TestSetPanic(t *testing.T) {
	ok := func(f func()) { f() }
	bad := shouldPanic
	clear := func(v Value) { v.Set(Zero(v.Type())) }

	type t0 struct {
		W int
	}

	type t1 struct {
		Y int
		t0
	}

	type T2 struct {
		Z       int
		namedT0 t0
	}

	type T struct {
		X int
		t1
		T2
		NamedT1 t1
		NamedT2 T2
		namedT1 t1
		namedT2 T2
	}

		Vungrouped = 0
	)


FUNCTIONS
	// F0 should be first. 
	func F0()

	// F1 should be second. 
	func F1()

	// F2 should be third. 
	func F2()


TYPES
	// T0 should be first. 
	type T0 struct{}

	// T1 should be second. 
	type T1 struct{}

	// T2 should be third. 
	type T2 struct{}

	// TG0 should be first. 
	type TG0 struct{}

	// TG1 should be second. 

	if d < 25*Second || 30*Second < d {
		t.Errorf("Until(Now().Add(-30s)) = %v, want roughly 30s (25s to 30s)", d)
	}

	t0 := Now()
	t1 = t0.Add(Duration(1<<63 - 1))
	if GetMono(&t1) != 0 {
		t.Errorf("Now().Add(maxDuration) has monotonic clock reading (%v => %v %d %d)", t0.String(), t1.String(), t0.Unix(), t1.Unix())
	}
	t2 := t1.Add(-Duration(1<<63 - 1))
	d = Since(t2)
	if d < -10*Second || 10*Second < d {

type (
	B  int
	C  int
	X0 *B
	T0 *C
)

func _(x X0) T0           { return T0(x /* ERROR "cannot convert" */) } // non-generic reference
func _[X X0, T T0](x X) T { return T(x /* ERROR "cannot convert" */) }
func _[T T0](x X0) T      { return T(x /* ERROR "cannot convert" */) }
func _[X X0](x X) T0      { return T0(x /* ERROR "cannot convert" */) }

// eliminates duplicate methods early (rather than at the
// end) to prevent exponential memory and time use.
// Without early elimination, computing T29 may take dozens
// of minutes.
type (
        T0 interface { m() }
        T1 interface { T0; T0 }
        T2 interface { T1; T1 }
        T3 interface { T2; T2 }
        T4 interface { T3; T3 }
        T5 interface { T4; T4 }
        T6 interface { T5; T5 }
        T7 interface { T6; T6 }

		<-tmp
	}
	<-c
}

func testReset(d Duration) error {
	t0 := NewTimer(2 * d)
	Sleep(d)
	if !t0.Reset(3 * d) {
		return errors.New("resetting unfired timer returned false")
	}
	Sleep(2 * d)
	select {
	case <-t0.C:
		return errors.New("timer fired early")
	default:
	}
	Sleep(2 * d)
	select {
	case <-t0.C:
	default:
		return errors.New("reset timer did not fire")
	}

}

func Build(ctx context.Context, b BuildSpec) error {
	ctx, span := tracing.Start(ctx, "Build")
	defer span.End()
	t0 := time.Now()
	lt := t0
	trace := func(format string, d ...any) {
		log.WithLabels("image", b.Name, "total", time.Since(t0), "step", time.Since(lt)).Infof(format, d...)
		lt = time.Now()
	}
	if len(b.Dests) == 0 {
		return fmt.Errorf("dest required")
	}

		Vungrouped = 0
	)


FUNCTIONS
	// F0 should be first. 
	func F0()

	// F1 should be second. 
	func F1()

	// F2 should be third. 
	func F2()


TYPES
	// T0 should be first. 
	type T0 struct{}

	// T1 should be second. 
	type T1 struct{}

	// T2 should be third. 
	type T2 struct{}

	// TG0 should be first. 
	type TG0 struct{}

	// TG1 should be second. 

type (
	I0 interface{}
	I1 interface{ foo() }
	I2 interface{ foo(x int) }
	T0 struct{}
	T1 struct{}
	T2 struct{}
)

func (*T1) foo() {}
func (*T2) foo(x int) {}

func issue10260() {
	var (
		i0 I0
		i1 I1
		i2 I2
		t0 *T0
		t1 *T1
		t2 *T2
	)

	var x I1

import (
	"context"
	"fmt"
	"log"
	"os"
	"runtime/trace"
	"time"
)

func main() {
	baseCtx := context.Background()

	// Create a task that starts and ends entirely outside of the trace.
	ctx0, t0 := trace.NewTask(baseCtx, "parent")

	// Create a task that starts before the trace and ends during the trace.
	ctx1, t1 := trace.NewTask(ctx0, "type1")

	// Start tracing.
	if err := trace.Start(os.Stdout); err != nil {