if wantMax > size {
				wantMax = size
			}
			if err := readMore(wantMax); err != nil {
				return nil, err
			}

			if int64(len(buf)) < want {
				return nil, fmt.Errorf("buffer shorter than expected (buflen: %d, want: %d): %w", len(buf), want, errFileCorrupt)
			}

			tmp = buf[want:]
			_, after, err := msgp.ReadUint32Bytes(tmp)
			if err != nil {