// which requires atomically getting an iterator and the size.
    // Moreover, we iterate this list far more often that we mutate,
    // making a (albeit home grown) copy-on-write strategy more appealing.
    private List<ProgressShieldingBuildOperationListener> listeners = Collections.emptyList();
    private final Lock listenersLock = new ReentrantLock();

	Mtu      uint32
	Refcnt   uint32
	Hopcount uint32
	Recvpipe uint32
	Sendpipe uint32
	Ssthresh uint32
	Rtt      uint32
	Rttvar   uint32
	Pad      uint32
}

type Mclpool struct {
	Grown int32
	Alive uint16
	Hwm   uint16
	Cwm   uint16
	Lwm   uint16
}

const (
	SizeofBpfVersion = 0x4
	SizeofBpfStat    = 0x8
	SizeofBpfProgram = 0x8
	SizeofBpfInsn    = 0x8

    int destSize = dest.length;
    int destIndex = 0;
    int lastEscape = 0;

    // Loop through the rest of the string, replacing when needed into the
    // destination buffer, which gets grown as needed as well.
    for (; index < slen; index++) {

      // Get a replacement for the current character.
      char[] r = escape(s.charAt(index));

      // If no replacement is needed, just continue.

    int destSize = dest.length;
    int destIndex = 0;
    int lastEscape = 0;

    // Loop through the rest of the string, replacing when needed into the
    // destination buffer, which gets grown as needed as well.
    for (; index < slen; index++) {

      // Get a replacement for the current character.
      char[] r = escape(s.charAt(index));

      // If no replacement is needed, just continue.

	Mtu      uint32
	Refcnt   uint32
	Hopcount uint32
	Recvpipe uint32
	Sendpipe uint32
	Ssthresh uint32
	Rtt      uint32
	Rttvar   uint32
	Pad      uint32
}

type Mclpool struct {
	Grown int32
	Alive uint16
	Hwm   uint16
	Cwm   uint16
	Lwm   uint16
}

const (
	SizeofBpfVersion = 0x4
	SizeofBpfStat    = 0x8
	SizeofBpfProgram = 0x10
	SizeofBpfInsn    = 0x8

pkg syscall (openbsd-386), type Dirent struct, Fileno uint32
pkg syscall (openbsd-386), type FdSet struct, Bits [32]int32
pkg syscall (openbsd-386), type Kevent_t struct, Data int32
pkg syscall (openbsd-386), type Mclpool struct, Grown uint32
pkg syscall (openbsd-386), type RtMetrics struct, Expire uint32
pkg syscall (openbsd-386), type Stat_t struct, Ino uint32
pkg syscall (openbsd-386), type Stat_t struct, Lspare0 int32

// It returns with at least one more byte in the buffer, or with s.ioerr != nil.
func (s *source) fill() {
	// determine content to preserve
	b := s.r
	if s.b >= 0 {
		b = s.b
		s.b = 0 // after buffer has grown or content has been moved down
	}
	content := s.buf[b:s.e]

	// grow buffer or move content down
	if len(content)*2 > len(s.buf) {
		s.buf = make([]byte, nextSize(len(s.buf)))
		copy(s.buf, content)

				m.close()
			} else {
				m1 = m
			}
		}
	}()

	v, headOff, head, ok := m.lookup(name)
	for !ok {
		// Lookup found an invalid pointer,
		// perhaps because the file has grown larger than the mapping.
		limit := m.load32(m.hdrLen + limitOff)
		if int64(limit) <= int64(len(m.mapping.Data)) {
			// Mapping doesn't need to grow, so lookup found actual corruption.
			debugPrintf("corrupt1\n")

func (r panicReader) Read(p []byte) (int, error) {
	if r.panic {
		panic("oops")
	}
	return 0, io.EOF
}

// Make sure that an empty Buffer remains empty when
// it is "grown" before a Read that panics
func TestReadFromPanicReader(t *testing.T) {

	// First verify non-panic behaviour
	var buf Buffer
	i, err := buf.ReadFrom(panicReader{})
	if err != nil {
		t.Fatal(err)
	}

the earth, and it would not be wonderful to meet a Megalosaurus, forty feet long or so, waddling like an elephantine lizard up Holborn Hill. Smoke lowering down from chimney-pots, making a soft black drizzle, with flakes of soot in it as big as full-grown snowflakes—gone into mourning, one might imagine, for the death of the sun. Dogs, undistinguishable in mire. Horses, scarcely better; splashed to their very blinkers. Foot passengers, jostling one another’s umbrellas in a general infection of ill temper,...