Function decode_long_errors 

pub fn decode_long_errors(
    residue_xor_const: u128,
    data_with_checksum_len: usize,
) -> Option<(Vec<usize>, Vec<u8>)>

Long-code analog of decode_regular_errors.

v0.3.1: promoted from pub(super) for downstream-consumer access (see decode_regular_errors docs).