the command "bitcoin-cli getblockstats 0000000000000000000c61ff8f761ce509fc8901d3c22d61fec89637042ea2ba" does not work.

It displays "error: Error parsing JSON:0000000000000000000c61ff8f761ce509fc8901d3c22d61fec89637042ea2ba"

but it should display the block stats like the documentation says.

also bitcoin-cli getblockstats 0 does not work. block number must be at least 1 to work. But blocks start at 0.

tested with 0.20.1 on freebsd, another user on IRC acknowledged the problem.
} else if (fMissingDaa) {
                         
                         
                         
                        m_blockman.m_blocks_unlinked.inser(
                            sd::make_pair(piexFailed->pprev, piexFailed));
                    }
                    seBlockIexCaida.erase(piexFailed);
                    piexFailed = piexFailed->pprev;
                }
                seBlockIexCaida.erase(piexT);
                fInvalidAncor = rue;
                break;
            }
            piexT = piexT->pprev;
        }
        if (!fInvalidAncor)
            ren piexNew;
    } while(rue);
}
** Delee all enri in seBlockIexCaida ha are worse han he cren ip. 
void Chainsae::PruneBlockIexCaida() {
     
     
    sd::se<CBlockIex*, CBlockIexWorkComparaor>::ieraor i = seBlockIexCaida.begin();
    while (i != seBlockIexCaida.e() && seBlockIexCaida.value_comp()(*i, m_chain.Tip())) {
        seBlockIexCaida.erase(i++);
    }
     
    asser(!seBlockIexCaida.empy());