"go/ast"
	"go/token"
)

func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
	switch n := x.(type) {
	default:
		error_(token.NoPos, "unexpected type %T in walk", x)
		panic("unexpected type")

	case *ast.IndexListExpr:
		f.walk(&n.X, ctxExpr, visit)
		f.walk(n.Indices, ctxExpr, visit)
	}
}

func funcTypeTypeParams(n *ast.FuncType) *ast.FieldList {
	return n.TypeParams

						if err := tw.WriteHeader(file.hdr); err != nil {
							b.Errorf("unexpected WriteHeader error: %v", err)
						}
						if _, err := tw.Write(file.body); err != nil {
							b.Errorf("unexpected Write error: %v", err)
						}
					}
					if err := tw.Close(); err != nil {
						b.Errorf("unexpected Close error: %v", err)
					}
				}
			})
		}
	})

	w := NewWalker(context, context.Dir)
	for _, pkg := range w.stdPackages {
		if strings.HasPrefix(pkg, "vendor/") || strings.HasPrefix(pkg, "golang.org/x/") {
			t.Fatalf("stdPackages contains unexpected package %s", pkg)
		}
	}
}

func TestIssue64958(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping with -short")
	}
	if *flagCheck {
		// slow, not worth repeating in -check

					exitCode = 1
				}
			}
			line = strings.TrimSpace(feature)
		} else {
			if strings.Contains(line, " #") {
				log.Printf("%s:%d: unexpected approval\n", filename, i+1)
				exitCode = 1
			}
		}
		nonblank = append(nonblank, line)
	}
	return nonblank
}

var fset = token.NewFileSet()

type Walker struct {

		tw := NewWriter(&b)
		if err := tw.WriteHeader(&Header{
			Name: name,
			Uid:  1 << 25, // Prevent USTAR format
		}); err != nil {
			t.Errorf("test %d, unexpected WriteHeader error: %v", i, err)
		}
		if err := tw.Close(); err != nil {
			t.Errorf("test %d, unexpected Close error: %v", i, err)
		}

		// The prefix field should never appear in the GNU format.
		var blk block
		copy(blk[:], b.Bytes())

            }
            if (updateIndices.size() != 1) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Unexpected update indices num: {}", updateIndices.size());
                }
                throw new SuggesterException("Unexpected update indices num:" + updateIndices.size());
            }
            final String updateIndex = updateIndices.get(0);

		if len(s.Bytes()) != 1 || text[i] != s.Bytes()[0] {
			t.Errorf("#%d: expected %q got %q", i, text[i], s.Bytes()[0])
		}
	}
	// Check correct termination location and error.
	if i != okCount {
		t.Errorf("unexpected termination; expected %d tokens got %d", okCount, i)
	}
	err := s.Err()
	if err != testError {
		t.Fatalf("expected %q got %v", testError, err)
	}
}

		if d.IsDir() {
			return nil
		}
		data, err := os.ReadFile(path)
		if err != nil {
			log.Fatal(err)
		}
		if strings.HasSuffix(path, ".zip") {
			log.Fatalf("unexpected file during walk: %s", path)
		}
		name := filepath.ToSlash(path)
		w, err := zw.CreateRaw(&zip.FileHeader{
			Name:               name,
			Method:             zip.Store,
			CompressedSize64:   uint64(len(data)),

	{"(1<<63)>>2", "right shift of value with high bit set"},
	{"(1<<62)>>2", ""},
	{`'\x80'`, "illegal UTF-8 encoding for character constant"},
	{"(23*4", "missing closing paren"},
	{")23*4", "unexpected ) evaluating expression"},
	{"18446744073709551616", "value out of range"},
}

func TestBadExpr(t *testing.T) {
	for i, test := range badExprTests {
		err := runBadTest(i, test, t)
		if err == nil {

	if _, _, err := r.ReadRune(); err != nil {
		t.Errorf("ReadRune: unexpected error: %v", err)
	}

	const want = "abcdef"
	r.Reset([]byte(want))
	if err := r.UnreadRune(); err == nil {
		t.Errorf("UnreadRune: expected error, got nil")
	}
	buf, err := io.ReadAll(r)
	if err != nil {
		t.Errorf("ReadAll: unexpected error: %v", err)
	}
	if got := string(buf); got != want {