}

		// Round off up to talign, assumed to be a power of 2.
		origOff := off
		off = (off + talign - 1) &^ (talign - 1)

		if f.ByteOffset > off {
			fld, sizes = c.pad(fld, sizes, f.ByteOffset-origOff)
			off = f.ByteOffset
		}
		if f.ByteOffset < off {
			// Drop a packed field that we can't represent.
			continue
		}

		n := len(fld)
		fld = fld[0 : n+1]
		if name == "" {