_ = x[TagEntryPoint-3]
	_ = x[TagEnumerationType-4]
	_ = x[TagFormalParameter-5]
	_ = x[TagImportedDeclaration-8]
	_ = x[TagLabel-10]
	_ = x[TagLexDwarfBlock-11]
	_ = x[TagMember-13]
	_ = x[TagPointerType-15]
	_ = x[TagReferenceType-16]
	_ = x[TagCompileUnit-17]
	_ = x[TagStringType-18]
	_ = x[TagStructType-19]
	_ = x[TagSubroutineType-21]
	_ = x[TagTypedef-22]
	_ = x[TagUnionType-23]

	offsets := []Offset{}
	for {
		e, err := r.Next()
		if err != nil {
			t.Fatal("r.Next:", err)
		}
		if e == nil {
			break
		}
		switch e.Tag {
		case TagBaseType, TagTypedef, TagPointerType, TagStructType:
			offsets = append(offsets, e.Offset)
		}
	}

	// Parse each type with a fresh type cache.
	for _, offset := range offsets {
		d := elfData(t, "testdata/cycle.elf")

	TagFormalParameter        Tag = 0x05
	TagImportedDeclaration    Tag = 0x08
	TagLabel                  Tag = 0x0A
	TagLexDwarfBlock          Tag = 0x0B
	TagMember                 Tag = 0x0D
	TagPointerType            Tag = 0x0F
	TagReferenceType          Tag = 0x10
	TagCompileUnit            Tag = 0x11
	TagStringType             Tag = 0x12
	TagStructType             Tag = 0x13
	TagSubroutineType         Tag = 0x15

				if n >= cap(t.Val) {
					val := make([]*EnumValue, n, n*2)
					copy(val, t.Val)
					t.Val = val
				}
				t.Val = t.Val[0 : n+1]
				t.Val[n] = f
			}
		}

	case TagPointerType:
		// Type modifier (DWARF v2 §5.2)
		// Attributes:
		//	AttrType: subtype [not required!  void* has no AttrType]
		//	AttrAddrClass: address class [ignored]
		t := new(PtrType)
		typ = t

	rdr := d.Reader()
	for entry, err := rdr.Next(); entry != nil; entry, err = rdr.Next() {
		if err != nil {
			t.Fatalf("error reading DWARF: %v", err)
		}
		switch entry.Tag {
		case dwarf.TagArrayType, dwarf.TagPointerType, dwarf.TagStructType, dwarf.TagBaseType, dwarf.TagSubroutineType, dwarf.TagTypedef:
		default:
			continue
		}
		typ, err := d.Type(entry.Offset)
		if err != nil {
			t.Fatalf("can't read type: %v", err)

		{"TagMutableType", Const, 0},
		{"TagNamelist", Const, 0},
		{"TagNamelistItem", Const, 0},
		{"TagNamespace", Const, 0},
		{"TagPackedType", Const, 0},
		{"TagPartialUnit", Const, 0},
		{"TagPointerType", Const, 0},
		{"TagPtrToMemberType", Const, 0},
		{"TagReferenceType", Const, 0},
		{"TagRestrictType", Const, 0},
		{"TagRvalueReferenceType", Const, 3},
		{"TagSetType", Const, 0},

pkg debug/dwarf, const TagNamelistItem Tag
pkg debug/dwarf, const TagNamespace Tag
pkg debug/dwarf, const TagPackedType Tag
pkg debug/dwarf, const TagPartialUnit Tag
pkg debug/dwarf, const TagPointerType Tag
pkg debug/dwarf, const TagPtrToMemberType Tag
pkg debug/dwarf, const TagReferenceType Tag
pkg debug/dwarf, const TagRestrictType Tag
pkg debug/dwarf, const TagSetType Tag
pkg debug/dwarf, const TagStringType Tag

pkg debug/dwarf, const TagNamelistItem = 44
pkg debug/dwarf, const TagNamespace = 57
pkg debug/dwarf, const TagPackedType = 45
pkg debug/dwarf, const TagPartialUnit = 60
pkg debug/dwarf, const TagPointerType = 15
pkg debug/dwarf, const TagPtrToMemberType = 31
pkg debug/dwarf, const TagReferenceType = 16
pkg debug/dwarf, const TagRestrictType = 55
pkg debug/dwarf, const TagSetType = 32