// Skip this number of uncompressed bytes.
					partSkip -= uCompOff
				}
			}
		} else {
			// Not encrypted
			var idx s2.Index
			_, err := idx.Load(s2.RestoreIndexHeaders(oi.Parts[firstPartIdx].Index))

			// Find compressed/uncompressed offsets of our partskip
			compOff, uCompOff, err2 := idx.Find(partSkip)

			if err == nil && err2 == nil && compOff > 0 {