}{
		{call: "Setegid(1)", fn: func() error { return syscall.Setegid(1) }, filter: "Gid:", expect: "\t0\t1\t0\t1"},
		{call: "Setegid(0)", fn: func() error { return syscall.Setegid(0) }, filter: "Gid:", expect: "\t0\t0\t0\t0"},

		{call: "Seteuid(1)", fn: func() error { return syscall.Seteuid(1) }, filter: "Uid:", expect: "\t0\t1\t0\t1"},
		{call: "Setuid(0)", fn: func() error { return syscall.Setuid(0) }, filter: "Uid:", expect: "\t0\t0\t0\t0"},

constant. It can do this by reading object files. If cgo has decided
that t1 is a type, v2 and v3 are variables or functions, and i4, i5
are integer constants, u6 is an unsigned integer constant, and f7 and f8
are float constants, and s9 and s10 are string constants, it generates:

	<preamble>
	__typeof__(t1) *__cgo__1;
	__typeof__(v2) *__cgo__2;
	__typeof__(v3) *__cgo__3;
	__typeof__(i4) *__cgo__4;

				done <- true
			}(j, ft)
			n++
		}
	}
	for ; n > 0; n-- {
		<-done
	}
}

func equalTimeAndZone(t1, t2 time.Time) bool {
	name1, offset1 := t1.Zone()
	name2, offset2 := t2.Zone()
	return t1.Equal(t2) && name1 == name2 && offset1 == offset2
}

func readTestFile(t *testing.T, zt ZipTest, ft ZipTestFile, f *File, raw []byte) {
	if f.Name != ft.Name {

</p>

<pre>
t.z          // t.z
t.y          // t.T1.y
t.x          // (*t.T0).x

p.z          // (*p).z
p.y          // (*p).T1.y
p.x          // (*(*p).T0).x

q.x          // (*(*q).T0).x        (*q).x is a valid field selector

p.M0()       // ((*p).T0).M0()      M0 expects *T0 receiver
p.M1()       // ((*p).T1).M1()      M1 expects T1 receiver

		}
		c.ptrs[key] = append(c.ptrs[key], t)

	case *dwarf.QualType:
		t1 := c.Type(dt.Type, pos)
		t.Size = t1.Size
		t.Align = t1.Align
		t.Go = t1.Go
		if unionWithPointer[t1.Go] {
			unionWithPointer[t.Go] = true
		}
		t.EnumValues = nil
		t.Typedef = ""
		t.C.Set("%s "+dt.Qual, t1.C)
		return t

	case *dwarf.StructType:

pkg syscall (netbsd-arm64-cgo), const IFT_STF = 215
pkg syscall (netbsd-arm64-cgo), const IFT_STF ideal-int
pkg syscall (netbsd-arm64-cgo), const IFT_T1 = 18
pkg syscall (netbsd-arm64-cgo), const IFT_T1 ideal-int
pkg syscall (netbsd-arm64-cgo), const IFT_TDLC = 116
pkg syscall (netbsd-arm64-cgo), const IFT_TDLC ideal-int
pkg syscall (netbsd-arm64-cgo), const IFT_TELINK = 200

	register["ZERO"] = riscv.REG_ZERO
	register["RA"] = riscv.REG_RA
	register["SP"] = riscv.REG_SP
	register["GP"] = riscv.REG_GP
	register["TP"] = riscv.REG_TP
	register["T0"] = riscv.REG_T0
	register["T1"] = riscv.REG_T1
	register["T2"] = riscv.REG_T2
	register["S0"] = riscv.REG_S0
	register["S1"] = riscv.REG_S1
	register["A0"] = riscv.REG_A0
	register["A1"] = riscv.REG_A1
	register["A2"] = riscv.REG_A2

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package p4

type Pair[T1 interface{ M() }, T2 ~int] struct {
	f1 T1
	f2 T2
}

func NewPair[T1 interface{ M() }, T2 ~int](v1 T1, v2 T2) Pair[T1, T2] {
	return Pair[T1, T2]{f1: v1, f2: v2}
}

func (p Pair[X1, _]) First() X1 {
	return p.f1
}

func (p Pair[_, X2]) Second() X2 {
	return p.f2
}

or of a type containing <code>T</code> as a component, directly or indirectly,
if those containing types are only array or struct types.
</p>

<pre>
// invalid array types
type (
	T1 [10]T1                 // element type of T1 is T1
	T2 [10]struct{ f T2 }     // T2 contains T2 as component of a struct
	T3 [10]T4                 // T3 contains T3 as component of a struct in T4

//go:build goexperiment.arenas

package arena_test

import (
	"arena"
	"testing"
)

type T1 struct {
	n int
}
type T2 [1 << 20]byte // 1MiB

func TestSmoke(t *testing.T) {
	a := arena.NewArena()
	defer a.Free()

	tt := arena.New[T1](a)
	tt.n = 1

	ts := arena.MakeSlice[T1](a, 99, 100)
	if len(ts) != 99 {
		t.Errorf("Slice() len = %d, want 99", len(ts))
	}
	if cap(ts) != 100 {