tests := []struct {
		name     string
		r        io.Reader
		bufSize  int // 0 means 16
		peekSize int

		n int // input to Discard

		want    int   // from Discard
		wantErr error // from Discard

		wantBuffered int
	}{
		{
			name:         "normal case",
			r:            strings.NewReader("abcdefghijklmnopqrstuvwxyz"),
			peekSize:     16,
			n:            6,

	FCFIDS F1, F2                   // ec400e9c
	FCFIDSCC F1, F2                 // ec400e9d
	FRES F1, F2                     // ec400830
	FRESCC F1, F2                   // ec400831
	FRIM F1, F2                     // fc400bd0
	FRIMCC F1, F2                   // fc400bd1
	FRIP F1, F2                     // fc400b90
	FRIPCC F1, F2                   // fc400b91
	FRIZ F1, F2                     // fc400b50

	}
}

func TestCVE202139293(t *testing.T) {
	// directory size is so large, that the check in Reader.init
	// overflows when subtracting from the archive size, causing
	// the pre-allocation check to be bypassed.
	data := []byte{
		0x50, 0x4b, 0x06, 0x06, 0x05, 0x06, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x4b,

// by gcc to learn the details of the constants, variables, and types
// being referred to as C.xxx.
func (p *Package) loadDWARF(f *File, conv *typeConv, names []*Name) {
	// Extract the types from the DWARF section of an object
	// from a well-formed C program. Gcc only generates DWARF info
	// for symbols in the object file, so it is not enough to print the
	// preamble and hope the symbols we care about will be there.
	// Instead, emit

	VMOVQ	$0x8040201008040202, $0x7040201008040201, V20         // VMOVQ	$-9205322385119247870, $8088500183983456769, V20

// mov(to/from sp)
	MOVD	$0x1002(RSP), R1              // MOVD	$4098(RSP), R1              // e107409121080091
	MOVD	$0x1708(RSP), RSP             // MOVD	$5896(RSP), RSP             // ff074091ff231c91