bitrotReaders[index] = newBitrotReader(disk, nil, "testbucket", "object", tillOffset, writeAlgorithm, bitrotWriterSum(writers[index]), erasure.ShardSize())
		}

		writer := bytes.NewBuffer(nil)
		_, err = erasure.Decode(context.Background(), writer, bitrotReaders, test.offset, test.length, test.data, nil)
		closeBitrotReaders(bitrotReaders)
		if err != nil && !test.shouldFail {