https://github.com/bitcoin/bitcoin/blob/68f3c7eb080e461cfeac37f8db7034fe507241d0/src/prevector.h#L152-L158

I'm opening an issue as its fix is too tiny to become a pull request.

Can be solved by renaming the struct to
```c
     struct indirect_contents { 
         size_type capacity; 
         char* indirect; 
     }; 
```
assert(setIterConflicting.size() == 1);
        CTxMemPool::txiter conflict = *setIterConflicting.begin();
        m_limit_descendants += 1;
        m_limit_descendant_size += conflict->GetSizeWithDescendants();
    }
    std::string errString;
    if (!m_pool.CalculateMemPoolAncestors(*entry, setAncestors, m_limit_ancestors, m_limit_ancestor_size, m_limit_descendants, m_limit_descendant_size, errString)) {
        setAncestors.clear();
        
        std::string dummy_err_string;
        
        
        
        
        
        
        
        
        
        
        
        if (nSize >  EXTRA_DESCENDANT_TX_SIZE_LIMIT ||
                !m_pool.CalculateMemPoolAncestors(*entry, setAncestors, 2, m_limit_ancestor_size, m_limit_descendants + 1, m_limit_descendant_size + EXTRA_DESCENDANT_TX_SIZE_LIMIT, dummy_err_string)) {
            return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "too-long-mempool-chain", errString);