}

	if !os.SameFile(fi1, fi2) {
		t.Errorf(`"NUL" and "nul" are not the same file`)
	}
}

func TestFileStatNUL(t *testing.T) {
	t.Parallel()

	f, err := os.Open("NUL")
	if err != nil {
		t.Fatal(err)
	}
	fi, err := f.Stat()
	if err != nil {
		t.Fatal(err)
	}
	if got, want := fi.Mode(), os.ModeDevice|os.ModeCharDevice|0666; got != want {

	if _ureg == nil || note == nil {
		print("sighandler: ureg ", _ureg, " note ", note, "\n")
		goto Throw
	}
	// Check that the note is no more than ERRMAX bytes (including
	// the trailing NUL). We should never receive a longer note.
	if len(notestr) > _ERRMAX-1 {
		print("sighandler: note is longer than ERRMAX\n")
		goto Throw
	}
	if isAbortPC(c.pc()) {
		// Never turn abort into a panic.
		goto Throw
	}

	sa.Len = uint8(3 + n) // 2 for Family, Len; 1 for NUL.
}

func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
	name := sa.Name
	n := len(name)
	if n > len(sa.raw.Path) {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_UNIX
	sa.raw.setLen(n)
	for i := 0; i < n; i++ {
		sa.raw.Path[i] = uint8(name[i])
	}
	// length is family (uint16), name, NUL.
	sl := _Socklen(2)
	if n > 0 {

		sa.raw.Path[i] = int8(name[i])
	}
	// length is family (uint16), name, NUL.
	sl := _Socklen(2)
	if n > 0 {
		sl += _Socklen(n) + 1
	}
	if sa.raw.Path[0] == '@' || (sa.raw.Path[0] == 0 && sl > 3) {
		// Check sl > 3 so we don't change unnamed socket behavior.
		sa.raw.Path[0] = 0
		// Don't count trailing NUL for abstract address.
		sl--
	}

	return unsafe.Pointer(&sa.raw), sl, nil
}

			}

			name := sf.name()
			file, line := u.fileLine(uf)
			if line == 0 {
				// Failure to symbolize
				continue
			}
			ctx.fn = &bytes(name)[0] // assume NUL-terminated
			ctx.line = uintptr(line)
			ctx.file = &bytes(file)[0] // assume NUL-terminated
			ctx.off = pc - fi.entry()
			ctx.res = 1
			if u.isInlined(uf) {
				// Set ctx.pc to the "caller" so the race detector calls this again

// that are not valid. While most of the values that can be encoded
// will not alter header field parsing, carriage return (CR, ASCII
// 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII
// 0x0) might be exploited by an attacker if they are translated
// verbatim. Any request or response that contains a character not
// permitted in a header field value MUST be treated as malformed

	for n := len(env); n > 0; n-- {
		kv := env[n-1]

		// Reject NUL in environment variables to prevent security issues (#56284);
		// except on Plan 9, which uses NUL as os.PathListSeparator (#56544).
		if !nulOK && strings.IndexByte(kv, 0) != -1 {
			err = errors.New("exec: environment variable contains NUL")
			continue
		}

		i := strings.Index(kv, "=")
		if i == 0 {

// It must not end with a dot (U+002E), nor contain two dots in a row.
//
// The element prefix up to the first dot must not be a reserved file name
// on Windows, regardless of case (CON, com1, NuL, and so on). The element
// must not have a suffix of a tilde followed by one or more ASCII digits
// (to exclude paths elements that look like Windows short-names).
//

//
//   - is within the subtree rooted at the directory in which path is evaluated
//   - is not an absolute path
//   - is not empty
//   - on Windows, is not a reserved name such as "NUL"
//
// If IsLocal(path) returns true, then
// Join(base, path) will always produce a path contained within base and
// Clean(path) will always produce an unrooted path with no ".." path elements.
//

func isIdent(c byte) bool {
	return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z' || '0' <= c && c <= '9' || c == '_' || c >= utf8.RuneSelf
}

var (
	errSyntax = errors.New("syntax error")
	errNUL    = errors.New("unexpected NUL in input")
)

// syntaxError records a syntax error, but only if an I/O error has not already been recorded.
func (r *importReader) syntaxError() {
	if r.err == nil {
		r.err = errSyntax
	}
}