for i := 0; i < 10; i++ {
		runtime.GC()
		select {
		case <-done:
			return true
		default:
		}
	}
	return false
}

func slice() {
	s := make([]byte, 100)
	s[0] = 1
	one := unsafe.SliceData(s)

	done := make(chan struct{})
	runtime.SetFinalizer(one, func(*byte) { close(done) })

	h := g(one)

	if wait(done) {
		panic("GC'd early")
	}

	if *h != 1 {
		panic("lost one")
	}

func Slice(ptr *ArbitraryType, len IntegerType) []ArbitraryType

// SliceData returns a pointer to the underlying array of the argument
// slice.
//   - If cap(slice) > 0, SliceData returns &slice[:1][0].
//   - If slice == nil, SliceData returns nil.
//   - Otherwise, SliceData returns a non-nil pointer to an
//     unspecified memory address.
func SliceData(slice []ArbitraryType) *ArbitraryType

		}
	})
}

func FuzzDecodeWTF16(f *testing.F) {
	for _, tt := range wtf8tests {
		b := unsafe.Slice((*uint8)(unsafe.Pointer(unsafe.SliceData(tt.wstr))), len(tt.wstr)*2)
		f.Add(b)
	}
	f.Fuzz(func(t *testing.T, b []byte) {
		u16 := unsafe.Slice((*uint16)(unsafe.Pointer(unsafe.SliceData(b))), len(b)/2)
		got := syscall.DecodeWTF16(u16, nil)
		if utf8.Valid(got) {
			// if the input is a valid UTF-8 string, then

	{"Slice", `type B *byte; var b B; _ = unsafe.Slice(b, 0)`, `func(*byte, int) []byte`},

	{"SliceData", "var s []int; _ = unsafe.SliceData(s)", `func([]int) *int`},
	{"SliceData", "type S []int; var s S; _ = unsafe.SliceData(s)", `func([]int) *int`},

	{"String", `var p *byte; _ = unsafe.String(p, 1)`, `func(*byte, int) string`},

		// and then fix up length and content to use file.
		symdata = slicedata(pos, "")
		symdata.Size = size
		symdata.Type = objabi.SNOPTRDATA
		info := symdata.NewFileInfo()
		info.Name = file
		info.Size = size
	}

	return symdata, size, nil
}

var slicedataGen int

func slicedata(pos src.XPos, s string) *obj.LSym {
	slicedataGen++

}

func regionFilename(address uint64) string {
	buf := make([]byte, _MAXPATHLEN)
	r := proc_regionfilename(
		os.Getpid(),
		address,
		unsafe.SliceData(buf),
		int64(cap(buf)))
	if r == 0 {
		return ""
	}
	return string(buf[:r])
}

// mach_vm_region and proc_regionfilename are implemented by
// the runtime package (runtime/sys_darwin.go).
//

	byteSliceOverwriteConstantBytes,
	byteSliceShuffleBytes,
	byteSliceSwapBytes,
}

func (m *mutator) mutateBytes(ptrB *[]byte) {
	b := *ptrB
	defer func() {
		if unsafe.SliceData(*ptrB) != unsafe.SliceData(b) {
			panic("data moved to new address")
		}
		*ptrB = b
	}()

	for {
		mut := byteSliceMutators[m.rand(len(byteSliceMutators))]
		if mutated := mut(m, b); mutated != nil {

	// unsafeString converts a []byte to a string with no allocation.
	// The caller must not modify b while the result string is in use.
	unsafeString := func(b []byte) string {
		return unsafe.String(unsafe.SliceData(b), len(b))
	}

	lengths := make([]int, 0) // lengths to test in ascending order
	for i := 0; i <= 128; i++ {
		lengths = append(lengths, i)
	}
	lengths = append(lengths, 256, 512, 1024, 1333, 4095, 4096, 4097)

	} else if b.addr != b {
		panic("strings: illegal use of non-zero Builder copied by value")
	}
}

// String returns the accumulated string.
func (b *Builder) String() string {
	return unsafe.String(unsafe.SliceData(b.buf), len(b.buf))
}

// Len returns the number of accumulated bytes; b.Len() == len(b.String()).
func (b *Builder) Len() int { return len(b.buf) }

func toString(b []byte) string {
	// unsafe.SliceData relies on cap whereas we want to rely on len
	if len(b) == 0 {
		return ""
	}
	// Copied from go 1.20.1 strings.Builder.String
	// https://github.com/golang/go/blob/202a1a57064127c3f19d96df57b9f9586145e21c/src/strings/builder.go#L48
	return unsafe.String(unsafe.SliceData(b), len(b))
}

// simple recorder that only appends warning