{data1[:511], 0, io.ErrUnexpectedEOF},
		{data1[:512], 1, io.ErrUnexpectedEOF},
		{data1[:1024], 1, io.EOF},
		{data1[:1536], 2, io.ErrUnexpectedEOF},
		{data1[:2048], 2, io.EOF},
		{data1, 2, io.EOF},
		{data1[:2048] + data2[:1536], 3, io.EOF},
		{data2[:511], 0, io.ErrUnexpectedEOF},
		{data2[:512], 1, io.ErrUnexpectedEOF},
		{data2[:1195], 1, io.ErrUnexpectedEOF},

	clear(b)
	return len(b), nil
}

// mustReadFull is like io.ReadFull except it returns
// io.ErrUnexpectedEOF when io.EOF is hit before len(b) bytes are read.
func mustReadFull(r io.Reader, b []byte) (int, error) {
	n, err := tryReadFull(r, b)
	if err == io.EOF {
		err = io.ErrUnexpectedEOF
	}
	return n, err
}

// tryReadFull is like io.ReadFull except it returns

		r, err := f.Open()
		if err != nil {
			continue
		}
		if f.UncompressedSize64 < 1e6 {
			n, err := io.Copy(io.Discard, r)
			if i == 3 && err != io.ErrUnexpectedEOF {
				t.Errorf("File[3] error = %v; want io.ErrUnexpectedEOF", err)
			}
			if err == nil && uint64(n) != f.UncompressedSize64 {
				t.Errorf("file %d: bad size: copied=%d; want=%d", i, n, f.UncompressedSize64)
			}
		}
		r.Close()

	}
	if err == nil {
		return
	}
	if err == io.EOF {
		if r.nread != r.f.UncompressedSize64 {
			return 0, io.ErrUnexpectedEOF
		}
		if r.desr != nil {
			if err1 := readDataDescriptor(r.desr, r.f); err1 != nil {
				if err1 == io.EOF {
					err = io.ErrUnexpectedEOF
				} else {
					err = err1
				}
			} else if r.hash.Sum32() != r.f.CRC32 {
				err = ErrChecksum
			}
		} else {

type alwaysError struct{}

func (alwaysError) Read(p []byte) (int, error) {
	return 0, io.ErrUnexpectedEOF
}

func TestNonEOFWithEmptyRead(t *testing.T) {
	scanner := NewScanner(alwaysError{})
	for scanner.Scan() {
		t.Fatal("read should fail")
	}
	err := scanner.Err()
	if err != io.ErrUnexpectedEOF {
		t.Errorf("unexpected error: %v", err)
	}
}

	if readLastByte && err == nil {
		_, err = mustReadFull(rs, []byte{0})
		sw.pos++
	}

	n = sw.pos - pos0
	switch {
	case err == io.EOF:
		return n, io.ErrUnexpectedEOF
	case err == ErrWriteTooLong:
		return n, errMissData // Not possible; implies bug in validation logic
	case err != nil:
		return n, err
	case sw.logicalRemaining() == 0 && sw.physicalRemaining() > 0:

			testRemaining{0, 0},
		},
	}, {
		maker: makeSparse{makeReg{4, "abcd"}, sparseHoles{{2, 3}}, 8},
		tests: []testFnc{
			testReadFrom{fileOps{"ab", int64(3), "cd"}, 7, io.ErrUnexpectedEOF},
			testRemaining{1, 0},
		},
	}, {
		maker: makeSparse{makeReg{4, "abcd"}, sparseHoles{{2, 3}}, 8},
		tests: []testFnc{
			testReadFrom{fileOps{"ab", int64(3), "cde"}, 7, errMissData},

}

var errorWriterToTests = []errorWriterToTest{
	{1, 0, nil, io.ErrClosedPipe, io.ErrClosedPipe},
	{0, 1, io.ErrClosedPipe, nil, io.ErrClosedPipe},
	{0, 0, io.ErrUnexpectedEOF, io.ErrClosedPipe, io.ErrUnexpectedEOF},
	{0, 1, io.EOF, nil, nil},
}

func TestReaderWriteToErrors(t *testing.T) {
	for i, rw := range errorWriterToTests {
		r := NewReader(rw)

			memset(p[n:n+repeat], part.b)
			n += repeat
			if n == len(p) {
				return
			}
			skipBytes = 0
		}
	}
	if n != len(p) {
		err = io.ErrUnexpectedEOF
	}
	return
}

// Just testing the rleBuffer used in the Zip64 test above. Not used by the zip code.
func TestRLEBuffer(t *testing.T) {
	b := new(rleBuffer)
	var all []byte

pkg io, type WriterTo interface, WriteTo(Writer) (int64, error)
pkg io, var EOF error
pkg io, var ErrClosedPipe error
pkg io, var ErrShortBuffer error
pkg io, var ErrShortWrite error
pkg io, var ErrUnexpectedEOF error
pkg io/ioutil, func NopCloser(io.Reader) io.ReadCloser
pkg io/ioutil, func ReadAll(io.Reader) ([]uint8, error)
pkg io/ioutil, func ReadDir(string) ([]os.FileInfo, error)