This is to track the regression introduced in master, which needs fixing for 0.14. See #9240, #9371, etc.
nTransactionsUpdated(0)
{
    _clear(); 
    
    
    
    nCheckFrequency = 0;
    minerPolicyEstimator = new CBlockPolicyEstimator(_minReasonableRelayFee);
}
CTxMemPool::~CTxMemPool()
{
    delete minerPolicyEstimator;
}
void CTxMemPool::pruneSpent(const uint256 &hashTx, CCoins &coins)
{
    LOCK(cs);
    auto it = mapNextTx.lower_bound(COutPoint(hashTx, 0));
    
    while (it != mapNextTx.end() && it->first->hash == hashTx) {
        coins.Spend(it->first->n); 
        it++;
    }
}
unsigned int CTxMemPool::GetTransactionsUpdated() const
{
    LOCK(cs);
    return nTransactionsUpdated;
}
void CTxMemPool::AddTransactionsUpdated(unsigned int n)