golang/go · error

loadmacho: %v: %v

Error message

loadmacho: %v: %v

What it means

Error "loadmacho: %v: %v" thrown in golang/go.

Source

Thrown at src/cmd/link/internal/loadmacho/ldmacho.go:428

		s.desc = m.e.Uint16(p[6:])
		if m.is64 {
			s.value = m.e.Uint64(p[8:])
		} else {
			s.value = uint64(m.e.Uint32(p[8:]))
		}
		p = p[symsize:]
	}

	symtab.str = strbuf
	symtab.sym = sym
	return 0
}

// Load the Mach-O file pn from f.
// Symbols are written into syms, and a slice of the text symbols is returned.
func Load(l *loader.Loader, arch *sys.Arch, localSymVersion int, f *bio.Reader, pkg string, length int64, pn string) (textp []loader.Sym, err error) {
	errorf := func(str string, args ...any) ([]loader.Sym, error) {
		return nil, fmt.Errorf("loadmacho: %v: %v", pn, fmt.Sprintf(str, args...))
	}

	base := f.Offset()

	hdr, _, err := f.Slice(7 * 4)
	if err != nil {
		return errorf("reading hdr: %v", err)
	}

	var e binary.ByteOrder
	if binary.BigEndian.Uint32(hdr[:])&^1 == 0xFEEDFACE {
		e = binary.BigEndian
	} else if binary.LittleEndian.Uint32(hdr[:])&^1 == 0xFEEDFACE {
		e = binary.LittleEndian
	} else {
		return errorf("bad magic - not mach-o file")
	}

View on GitHub (pinned to b6b368adc5)

When it happens

Trigger: Thrown at src/cmd/link/internal/loadmacho/ldmacho.go:428 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of golang/go@b6b368adc5 (2026-08-12). Data as JSON: /api/errors/0171c63f50f73516. Report an issue: GitHub.