// argument (more than 4k) to trigger the bug, but the overall file
	// has to remain small (since large files will be read with mmap).
	covdir := filepath.Join(d, "covdata")
	if err = os.Mkdir(covdir, 0777); err != nil {
		t.Fatalf("creating covdir: %v", err)
	}
	large := fmt.Sprintf("%07999d", 0)
	cmd = testenv.Command(t, exepath, "1", "2", "3", large)
	cmd.Dir = covdir
	cmd.Env = append(os.Environ(), "GOCOVERDIR="+covdir)

			0x4f, 0x78, 0xa7, 0xf6, 0xd2, 0x98, 0x09, 0x58, 0x5a, 0x97, 0xda, 0xec, 0x58, 0xc6, 0xb0, 0x50,
		},
	},
	{
		"CTR-AES256",
		commonKey256,
		commonCounter,
		commonInput,
		[]byte{
			0x60, 0x1e, 0xc3, 0x13, 0x77, 0x57, 0x89, 0xa5, 0xb7, 0xa7, 0xf5, 0x04, 0xbb, 0xf3, 0xd2, 0x28,
			0xf4, 0x43, 0xe3, 0xca, 0x4d, 0x62, 0xb5, 0x9a, 0xca, 0x84, 0xe9, 0x90, 0xca, 0xca, 0xf5, 0xc5,

    }

    protected void addDir(String relativePath) {
        dirs.add(relativePath)
    }

    protected void addMode(String relativePath, int mode) {
        fileModesByRelativePath.put(relativePath, mode & 0777)
    }

    def assertFileMode(String relativePath, int fileMode) {
        List<Integer> modes = fileModesByRelativePath.get(relativePath)
        assert modes.size() == 1

	}
	if cfg.SumdbDir == "" {
		return fmt.Errorf("could not locate sumdb file: missing $GOPATH: %s",
			cfg.GoPathError)
	}
	targ := filepath.Join(cfg.SumdbDir, file)
	os.MkdirAll(filepath.Dir(targ), 0777)
	f, err := lockedfile.Edit(targ)
	if err != nil {
		return err
	}
	defer f.Close()
	data, err := io.ReadAll(f)
	if err != nil {
		return err
	}
	if len(data) > 0 && !bytes.Equal(data, old) {

	BYTE $0x64; BYTE $0x65; BYTE $0x62; BYTE $0x66
	BYTE $0x63; BYTE $0x67; BYTE $0x9e; BYTE $0x68
	BYTE $0x74; BYTE $0x71; BYTE $0x72; BYTE $0x73
	BYTE $0x78; BYTE $0x75; BYTE $0x76; BYTE $0x77
	BYTE $0xac; BYTE $0x69; BYTE $0xed; BYTE $0xee
	BYTE $0xeb; BYTE $0xef; BYTE $0xec; BYTE $0xbf
	BYTE $0x80; BYTE $0xfd; BYTE $0xfe; BYTE $0xfb
	BYTE $0xfc; BYTE $0xba; BYTE $0xae; BYTE $0x59

	if err != nil {
		return
	}
	err = en.WriteString(z.Source)
	if err != nil {
		err = msgp.WrapError(err, "Source")
		return
	}
	// write "Owner"
	err = en.Append(0xa5, 0x4f, 0x77, 0x6e, 0x65, 0x72)
	if err != nil {
		return
	}
	err = en.WriteString(z.Owner)
	if err != nil {
		err = msgp.WrapError(err, "Owner")
		return
	}
	// write "Quorum"

000002c0  b8 ec 51 46 99 6d 1e 83  9b 9d 44 a7 85 5a 10 23  |..QF.m....D..Z.#|
000002d0  74 a3 b6 09 b5 d7 2a 12  6a e2 2a da 5d 87 d9 fe  |t.....*.j.*.]...|
000002e0  b6 c7 8f c8 03 27 b0 6e  98 57 6f e4 d5 8b 88 5d  |.....'.n.Wo....]|
000002f0  0a b3 c4 a1 ae df 89 53  af d5 8e 59 97 2d 65 c0  |.......S...Y.-e.|
00000300  52 e8 5f 8a 37 3f 8b ef  77 fc 93 0c b5 50 3b 94  |R._.7?..w....P;.|

74\227b\036>\352W6\270\344\342\254=\352\300L=\036j\257;\364\233\037\276\334\237\326\266\367o\2066\033\006c\267\336o\220\275\327i\013\276\217\347\215>O\336)\272J\243\306=\254\\q=:\037|>H\345\212\276P@:>\237\021\'\2715\235x\276\245\325\2266\224\2603>]\300L\270\376\255\313\274Y\220\366=\024\23248,\035\006>\032H\321;%F\2377`Vb\274\221\013b\270\254\034\030\274\333z\252\275\232M\347\267\033k\371=\347y>\274\220\217\244;\313\274\264\275\323\034\302\267\030\013!\270L\ra6\205\216\334\275TF\032=\374\273:\2...

00000080  b0 ac 51 ed 14 ef 68 ca  42 c5 4c 85 f6 26 0d a4  |..Q...h.B.L..&..|
00000090  ad a8 f5 14 64 4f b9 c3  fb 1e 55 c1 1f c7 31 57  |....dO....U...1W|
000000a0  72 68 db 03 37 a8 c9 07  f4 ca 62 6c 5c f3 8b 5a  |rh..7.....bl\..Z|
000000b0  3d 76 dd 63 ea 68 61 6b  a1 2d 95 49 38 16 7e 51  |=v.c.hak.-.I8.~Q|
000000c0  5c e5 15 c0 58 7d c5 67  4a 6f 64 b6 79 1a 41 9b  |\...X}.gJod.y.A.|

	// directory to better permissions before anything else. We created this directory, so we
	// shouldn't need to do any privilege trickery.
	if err := privesc("chmod", "0777", filepath.Dir(bin)); err != nil {
		t.Skipf("unable to set permissions on %q, likely no passwordless sudo/su: %s", filepath.Dir(bin), err)
	}

	if err := privesc("chown", user, bin); err != nil {