// yield for sibling nodes even after yield had returned false. With that
	// bug, this test failed with a runtime panic.
	src := "package p\ntype T struct {\n\tF int `json:\"f\"` // a field\n}\n"

	fset := token.NewFileSet()
	f, err := parser.ParseFile(fset, "", src, 0)
	if err != nil {
		panic(err)
	}

	for n := range ast.Preorder(f) {
		if id, ok := n.(*ast.Ident); ok && id.Name == "F" {
			break
		}
	}

.*have M5[(]struct{b[.]S; b[.]t}[)]
.*want M5[(]struct{b[.]S; t}[)]`},
	}

	fset := token.NewFileSet()
	test := func(main, b, want string) {
		re := regexp.MustCompile(want)
		bpkg := mustTypecheck(b, nil, nil)
		mast := mustParse(fset, main)
		conf := Config{Importer: importHelper{pkg: bpkg}}
		_, err := conf.Check(mast.Name.Name, fset, []*ast.File{mast}, nil)
		if err == nil {
			t.Error("Expected failure, but it did not")

func (p *Package) annotateFile(name string, fd io.Writer) {
	fset := token.NewFileSet()
	content, err := os.ReadFile(name)
	if err != nil {
		log.Fatalf("cover: %s: %s", name, err)
	}
	parsedFile, err := parser.ParseFile(fset, name, content, parser.ParseComments)
	if err != nil {
		log.Fatalf("cover: %s: %s", name, err)
	}

	file := &File{
		fset:    fset,
		name:    name,
		content: content,

				return
			}
			s := string(data)
			s = s[:strings.LastIndex(s, "\n$$\n")]

			input := pkgbits.NewPkgDecoder(id, s)
			pkg = readUnifiedPackage(fset, nil, packages, input)
		case 'i':
			pkg, err = iImportData(fset, packages, buf, id)
		default:
			err = fmt.Errorf("import %q: old binary export format no longer supported (recompile library)", path)
		}

	default:

func checkCopyLocksAssign(pass *analysis.Pass, as *ast.AssignStmt) {
	for i, x := range as.Rhs {
		if path := lockPathRhs(pass, x); path != nil {
			pass.ReportRangef(x, "assignment copies lock value to %v: %v", analysisutil.Format(pass.Fset, as.Lhs[i]), path)
		}
	}
}

// checkCopyLocksGenDecl checks whether lock is copied
// in variable declaration.
func checkCopyLocksGenDecl(pass *analysis.Pass, gd *ast.GenDecl) {
	if gd.Tok != token.VAR {

)

var fset = token.NewFileSet()

func parseFiles(t *testing.T, filenames []string, srcs [][]byte, mode parser.Mode) ([]*ast.File, []error) {
	var files []*ast.File
	var errlist []error
	for i, filename := range filenames {
		file, err := parser.ParseFile(fset, filename, srcs[i], mode)
		if file == nil {
			t.Fatalf("%s: %s", filename, err)
		}

				id.Name = gofmt(def)
			}
		}
	}

	conf.Fprint(&buf, fset, f.AST)

	return buf.String()
}

var gofmtBuf strings.Builder

// gofmt returns the gofmt-formatted string for an AST node.
func gofmt(n interface{}) string {
	gofmtBuf.Reset()
	err := printer.Fprint(&gofmtBuf, fset, n)
	if err != nil {
		return "<" + err.Error() + ">"
	}
	return gofmtBuf.String()

		for r.err == nil && !r.eof {
			r.readByte()
		}
		info.header = r.buf
	}
	if r.err != nil {
		return r.err
	}

	if info.fset == nil {
		return nil
	}

	// Parse file header & record imports.
	info.parsed, info.parseErr = parser.ParseFile(info.fset, info.name, info.header, parser.ImportsOnly|parser.ParseComments)
	if info.parseErr != nil {
		return nil
	}

	hasEmbed := false

		if err := checkOtherFile(pass, name); err != nil {
			return nil, err
		}
	}
	for _, name := range pass.IgnoredFiles {
		if strings.HasSuffix(name, ".go") {
			f, err := parser.ParseFile(pass.Fset, name, nil, parser.ParseComments)
			if err != nil {
				// Not valid Go source code - not our job to diagnose, so ignore.
				continue
			}
			checkGoFile(pass, f)
		} else {

// behavior if ignored.
type Error struct {
	Fset *token.FileSet // file set for interpretation of Pos
	Pos  token.Pos      // error position
	Msg  string         // error message
	Soft bool           // if set, error is "soft"

	// go116code is a future API, unexported as the set of error codes is large
	// and likely to change significantly during experimentation. Tools wishing