Cannot correct errors?

[factorizer]

This library says that it implements FEC. However, it seems that it can only recover from erasures. Is this correct?
I have modified fec_test.cpp to introduce one-bit error in the first byte of the first data shard and it cannot recover the data. I have used 5 data shards and 3 parity shards.

Is this a bug or I am correct in saying that this library can recover data only from erasures?

Thanks!