This is to track the regression introduced in master, which needs fixing for 0.14. See #9240, #9371, etc.
/** \class CTxMemPoolEntry
 *
 * CTxMemPoolEntry stores data about the corresponding transaction, as well
 * as data about all in-mempool transactions that depend on the transaction
 * ("descendant" transactions).
 *
 * When a new entry is added to the mempool, we update the descendant state
 * (nCountWithDescendants, nSizeWithDescendants, and nModFeesWithDescendants) for
 * all ancestors of the newly added transaction.
 *
 * If updating the descendant state is skipped, we can mark the entry as
 * "dirty", and set nSizeWithDescendants/nModFeesWithDescendants to equal nTxSize/
 * nFee+feeDelta. (This can potentially happen during a reorg, where we limit the
 * amount of work we're willing to do to avoid consuming too much CPU.)
 *
 */
class CTxMemPoolEntry