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; 
     }; 
```
{
    CBlockIndex* to_mark_failed = pindex;
    bool pindex_was_in_chain = false;
    int disconnected = 0;
    
    
    
    LOCK(m_cs_chainstate);
    
    
    
    
    
    
    
    std::multimap<const arith_uint256, CBlockIndex *> candidate_blocks_by_work;
    {
        LOCK(cs_main);
        for (const auto& entry : m_blockman.m_block_index) {
            CBlockIndex *candidate = entry.second;
            
            
            
            
            
            if (!m_chain.Contains(candidate) &&
                    !CBlockIndexWorkComparator()(candidate, pindex->pprev) &&
                    candidate->IsValid(BLOCK_VALID_TRANSACTIONS) &&
                    candidate->HaveTxsDownloaded()) {