// TODO(gri) Do this more efficiently.
		var buf bytes.Buffer
		err := config.Fprint(&buf, fset, file)
		if err != nil {
			return err
		}
		file, err = parser.ParseFile(fset, "", buf.Bytes(), parserMode)
		if err != nil {
			// We should never get here. If we do, provide good diagnostic.
			return fmt.Errorf("format.Node internal error (%s)", err)
		}
		ast.SortImports(fset, file)

		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 {

			continue
		}
		text, err := os.ReadFile(filepath.Join("testdata", f.Name()))
		if err != nil {
			t.Fatalf("can't read testdata/%s: %v", f.Name(), err)
		}
		fset := token.NewFileSet()
		code, err := parser.ParseFile(fset, f.Name(), text, 0)
		if err != nil {
			t.Fatalf("can't parse testdata/%s: %v", f.Name(), err)
		}
		srcs = append(srcs, filepath.Join("testdata", f.Name()))
		foundTest := false

                    toolchainsSource.getLocation(),
                    loc != null ? loc.getLineNumber() : -1,
                    loc != null ? loc.getColumnNumber() : -1,
                    e,
                    "Non-parseable toolchains " + toolchainsSource.getLocation() + ": " + e.getMessage(),
                    BuilderProblem.Severity.FATAL));
            return PersistedToolchains.newInstance();
        } catch (IOException e) {

		}

		fmt.Println()
		fmt.Println("Reported errors:")
	}

	f, err := os.Open(filename)
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()

	ParseFile(filename, func(err error) {
		e, ok := err.(Error)
		if !ok {
			return
		}

		if *print {
			fmt.Println(err)
			return
		}

		orig := position{e.Pos.Line(), e.Pos.Col()}

	for _, fi := range fis {
		t.Run(fi.Name(), func(t *testing.T) {
			fset := token.NewFileSet()
			path := filepath.Join(dir, fi.Name())
			src := readFile(path) // panics on failure
			var mode Mode
			file, err := ParseFile(fset, path, src, mode)
			if err != nil {
				t.Fatal(err)
			}

			// Compare the positions of objects resolved during parsing (fromParser)
			// to those annotated in source comments (fromComments).

		return bytes.ReplaceAll(b, []byte("$\n"), []byte("\n"))
	}
	for _, file := range files {
		t.Run(filepath.Base(file), func(t *testing.T) {
			var pr Printer
			a, err := txtar.ParseFile(file)
			if err != nil {
				t.Fatal(err)
			}
			if len(a.Comment) > 0 {
				err := json.Unmarshal(a.Comment, &pr)
				if err != nil {
					t.Fatalf("unmarshaling top json: %v", err)
				}
			}

	} else {
		err = os.WriteFile("builtin.go", out, 0666)
	}
	if err != nil {
		log.Fatal(err)
	}
}

func mkbuiltin(w io.Writer, name string) {
	fset := token.NewFileSet()
	f, err := parser.ParseFile(fset, filepath.Join("_builtin", name+".go"), nil, 0)
	if err != nil {
		log.Fatal(err)
	}

	var interner typeInterner

	fmt.Fprintf(w, "var %sDecls = [...]struct { name string; tag int; typ int }{\n", name)

					break
				}
			}
		}
	}
	t.Run("V2", func(t *testing.T) {
		testPath := "testdata/tests/go122-gc-stress.test"
		r, _, err := testtrace.ParseFile(testPath)
		if err != nil {
			t.Fatalf("malformed test %s: bad trace file: %v", testPath, err)
		}
		var events []trace.Event
		tr, err := trace.NewReader(r)
		if err != nil {

	return nil
}

// findFuncs parses the file and returns a slice of FuncExtent descriptors.
func findFuncs(name string) ([]*FuncExtent, error) {
	fset := token.NewFileSet()
	parsedFile, err := parser.ParseFile(fset, name, nil, 0)
	if err != nil {
		return nil, err
	}
	visitor := &FuncVisitor{
		fset:    fset,
		name:    name,
		astFile: parsedFile,
	}
	ast.Walk(visitor, visitor.astFile)