pkg database/sql, type TxOptions struct, ReadOnly bool
pkg debug/pe, method (*COFFSymbol) FullName(StringTable) (string, error)
pkg debug/pe, method (StringTable) String(uint32) (string, error)
pkg debug/pe, type File struct, COFFSymbols []COFFSymbol
pkg debug/pe, type File struct, StringTable StringTable
pkg debug/pe, type Reloc struct
pkg debug/pe, type Reloc struct, SymbolTableIndex uint32
pkg debug/pe, type Reloc struct, Type uint16

can include one or more `//go:debug` directives at the top of the file
(preceding the `package` statement).
Continuing the `panicnil` example, if the module or workspace is updated
to say `go` `1.21`, the program can opt back into the old `panic(nil)`
behavior by including this directive:

	//go:debug panicnil=1

Starting in Go 1.21, the Go toolchain treats a `//go:debug` directive

pkg debug/dwarf, const ClassLinePtr = 6
pkg debug/dwarf, const ClassLinePtr Class
pkg debug/dwarf, const ClassLocListPtr = 7
pkg debug/dwarf, const ClassLocListPtr Class
pkg debug/dwarf, const ClassMacPtr = 8
pkg debug/dwarf, const ClassMacPtr Class
pkg debug/dwarf, const ClassRangeListPtr = 9
pkg debug/dwarf, const ClassRangeListPtr Class
pkg debug/dwarf, const ClassReference = 10
pkg debug/dwarf, const ClassReference Class

pkg debug/elf, const R_LARCH_ABS_LO12 = 68 #54222
pkg debug/elf, const R_LARCH_ABS_LO12 R_LARCH #54222
pkg debug/elf, const R_LARCH_B16 = 64 #54222
pkg debug/elf, const R_LARCH_B16 R_LARCH #54222
pkg debug/elf, const R_LARCH_B21 = 65 #54222
pkg debug/elf, const R_LARCH_B21 R_LARCH #54222
pkg debug/elf, const R_LARCH_B26 = 66 #54222
pkg debug/elf, const R_LARCH_B26 R_LARCH #54222
pkg debug/elf, const R_LARCH_GNU_VTENTRY = 58 #54222

pkg debug/dwarf, method (*Data) AddTypes(string, []uint8) error
pkg debug/macho, const CpuArm = 12
pkg debug/macho, const CpuArm Cpu
pkg debug/macho, const CpuPpc = 18
pkg debug/macho, const CpuPpc Cpu
pkg debug/macho, const CpuPpc64 = 16777234
pkg debug/macho, const CpuPpc64 Cpu
pkg debug/macho, const MagicFat = 3405691582
pkg debug/macho, const MagicFat uint32
pkg debug/macho, const TypeBundle = 8

	if symName != funcName {
		t.Fatalf("expected function name %v; got %v", symName, funcName)
	}
	fi1, err := os.Stat("addr2line_test.go")
	if err != nil {
		t.Fatalf("Stat failed: %v", err)
	}

	// Debug paths are stored slash-separated, so convert to system-native.
	srcPath = filepath.FromSlash(srcPath)
	fi2, err := os.Stat(srcPath)

	if err != nil {
		t.Fatalf("Stat failed: %v", err)
	}

pkg debug/elf, const R_MIPS_PC16 = 10
pkg debug/elf, const R_MIPS_PC16 R_MIPS
pkg debug/elf, const R_MIPS_PJUMP = 35
pkg debug/elf, const R_MIPS_PJUMP R_MIPS
pkg debug/elf, const R_MIPS_REL16 = 33
pkg debug/elf, const R_MIPS_REL16 R_MIPS
pkg debug/elf, const R_MIPS_REL32 = 3
pkg debug/elf, const R_MIPS_REL32 R_MIPS
pkg debug/elf, const R_MIPS_RELGOT = 36
pkg debug/elf, const R_MIPS_RELGOT R_MIPS
pkg debug/elf, const R_MIPS_SCN_DISP = 32

pkg debug/buildinfo, func Read(io.ReaderAt) (*debug.BuildInfo, error)
pkg debug/buildinfo, func ReadFile(string) (*debug.BuildInfo, error)
pkg debug/buildinfo, type BuildInfo = debug.BuildInfo
pkg debug/dwarf, type BasicType struct, DataBitOffset int64
pkg debug/dwarf, type StructField struct, DataBitOffset int64
pkg debug/elf, const R_PPC64_RELATIVE = 22
pkg debug/elf, const R_PPC64_RELATIVE R_PPC64

pkg debug/dwarf, const AttrDataMemberLoc Attr
pkg debug/dwarf, const AttrDeclColumn Attr
pkg debug/dwarf, const AttrDeclFile Attr
pkg debug/dwarf, const AttrDeclLine Attr
pkg debug/dwarf, const AttrDeclaration Attr
pkg debug/dwarf, const AttrDefaultValue Attr
pkg debug/dwarf, const AttrDescription Attr
pkg debug/dwarf, const AttrDiscr Attr
pkg debug/dwarf, const AttrDiscrList Attr
pkg debug/dwarf, const AttrDiscrValue Attr

pkg reflect, type MapIter struct
pkg runtime/debug, func ReadBuildInfo() (*BuildInfo, bool)
pkg runtime/debug, type BuildInfo struct
pkg runtime/debug, type BuildInfo struct, Deps []*Module
pkg runtime/debug, type BuildInfo struct, Main Module
pkg runtime/debug, type BuildInfo struct, Path string
pkg runtime/debug, type Module struct
pkg runtime/debug, type Module struct, Path string
pkg runtime/debug, type Module struct, Replace *Module