n2BeforeWaitWG := sync.WaitGroup{}
	// so we know when all requests in n2 have called Done and
	// are finished using the waitgroup
	n2DoneWG := sync.WaitGroup{}

	startCh, blockedCh := make(chan struct{}), make(chan struct{})
	n1DoneWG.Add(n1)
	for i := 0; i < n1; i++ {
		go func() {
			defer n1DoneWG.Done()
			<-startCh

			target.Add(1)
			// let's finish using the waitgroup immediately
			target.Done()
		}()

// ProcThreadAttributeListContainer.List.
type ProcThreadAttributeList struct{}

type ProcThreadAttributeListContainer struct {
	data     *ProcThreadAttributeList
	pointers []unsafe.Pointer
}

type ProcessInformation struct {
	Process   Handle
	Thread    Handle
	ProcessId uint32
	ThreadId  uint32
}

type ProcessEntry32 struct {
	Size            uint32
	Usage           uint32

// go.dev/issue/49482
type (
	t[a *[]int] struct{}
	t[a *t,] struct{}
	t[a *t|[]int] struct{}
	t[a *t|t,] struct{}
	t[a *t|~t,] struct{}
	t[a *struct{}|t] struct{}
	t[a *t|struct{}] struct{}
	t[a *struct{}|~t] struct{}
)

// go.dev/issue/51488
type (
	t[a *t|t,] struct{}
	t[a *t|t, b t] struct{}
	t[a *t|t] struct{}
	t[a *[]t|t] struct{}
	t[a ([]t)] struct{}
	t[a ([]t)|t] struct{}
)

type (
        // these need a comma to disambiguate
        _[P *T,] struct{}
        _[P *T, _ any] struct{}
        _[P (*T),] struct{}
        _[P (*T), _ any] struct{}
        _[P (T),] struct{}
        _[P (T), _ any] struct{}

        // these parse as name followed by type
        _[P *struct{}] struct{}
        _[P (*struct{})] struct{}
        _[P ([]int)] struct{}

        // array declarations
        _ [P(T)]struct{}

func _[P ~int, Q int | string]() {}
func _[P struct{f int}, Q *P]() {}

// various potentially ambiguous type parameter lists (issue #49482)
type _[P *T,] struct{}
type _[P T | T] struct{}
type _[P T | T | T | T] struct{}
type _[P *T, _ any] struct{}
type _[P (*T),] struct{}
type _[P (*T), _ any] struct{}
type _[P (T),] struct{}
type _[P (T), _ any] struct{}

type _[P *struct{}] struct{}
type _[P (*struct{})] struct{}

// mapType represents a map type.
type mapType struct {
	abi.MapType
}

// ptrType represents a pointer type.
type ptrType struct {
	abi.PtrType
}

// sliceType represents a slice type.
type sliceType struct {
	abi.SliceType
}

// Struct field
type structField = abi.StructField

// structType represents a struct type.
type structType struct {
	abi.StructType
}

type Mode_t uint32

type Timespec struct {
	Sec  int64
	Nsec int64
}

type Timeval struct {
	Sec  int64
	Usec int32
	_    [4]byte
}

type Timeval32 struct {
	Sec  int32
	Usec int32
}

type Timex struct{}

type Time_t int64

type Tms struct{}

type Utimbuf struct {
	Actime  int64
	Modtime int64
}

type Timezone struct {
	Minuteswest int32
	Dsttime     int32

	SizeofBpfZbufHeader = 0x20
)

type BpfVersion struct {
	Major uint16
	Minor uint16
}

type BpfStat struct {
	Recv uint32
	Drop uint32
}

type BpfZbuf struct {
	Bufa   *byte
	Bufb   *byte
	Buflen uint64
}

type BpfProgram struct {
	Len   uint32
	Insns *BpfInsn
}

type BpfInsn struct {
	Code uint16
	Jt   uint8
	Jf   uint8
	K    uint32
}

	_ = &T7{&T4{}}
	_ = &T8{&T4{}}
	_ = &T9{&T4{}}
	_ = &T12{&T15{}, &T13{}, &T16{}}

	var (
		tn    struct{ Next *T11 }
		tz    struct{ z *struct{ Next *T11 } }
		tpz   *struct{ z *struct{ Next *T11 } }
		tppz  **struct{ z *struct{ Next *T11 } }
		tpppz ***struct{ z *struct{ Next *T11 } }
		ty    struct {
			y ***struct{ z *struct{ Next *T11 } }
		}
	)
	tn.Next = &T11{}
	tz.z = &tn
	tpz = &tz
	tppz = &tpz
	tpppz = &tppz

	Data   [12]int8
}

type RawSockaddr struct {
	Len    uint8
	Family uint8
	Data   [14]int8
}

type RawSockaddrAny struct {
	Addr RawSockaddr
	Pad  [92]int8
}

type _Socklen uint32

type Linger struct {
	Onoff  int32
	Linger int32
}

type Iovec struct {
	Base *byte
	Len  uint32
}

type IPMreq struct {
	Multiaddr [4]byte /* in_addr */