hdr := &Header{
		Name:       "file.txt",
		Uid:        1 << 21, // Too big for 8 octal digits
		Size:       int64(len(data)),
		ModTime:    time.Now().Round(time.Second),
		PAXRecords: map[string]string{"uid": "2097152"},
		Format:     FormatPAX,
		Typeflag:   TypeReg,
	}
	if err := tw.WriteHeader(hdr); err != nil {
		t.Fatalf("tw.WriteHeader: %v", err)
	}
	if _, err := tw.Write(data); err != nil {

pkg syscall (windows-386), const FILE_ATTRIBUTE_REPARSE_POINT = 1024
pkg syscall (windows-386), const FILE_ATTRIBUTE_REPARSE_POINT ideal-int
pkg syscall (windows-386), const FILE_FLAG_OPEN_REPARSE_POINT = 2097152
pkg syscall (windows-386), const FILE_FLAG_OPEN_REPARSE_POINT ideal-int
pkg syscall (windows-386), const FSCTL_GET_REPARSE_POINT = 589992
pkg syscall (windows-386), const FSCTL_GET_REPARSE_POINT ideal-int

pkg debug/macho, const FlagNoReexportedDylibs = 1048576
pkg debug/macho, const FlagNoReexportedDylibs uint32
pkg debug/macho, const FlagNoUndefs = 1
pkg debug/macho, const FlagNoUndefs uint32
pkg debug/macho, const FlagPIE = 2097152
pkg debug/macho, const FlagPIE uint32
pkg debug/macho, const FlagPrebindable = 2048
pkg debug/macho, const FlagPrebindable uint32
pkg debug/macho, const FlagPrebound = 16
pkg debug/macho, const FlagPrebound uint32