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; 
     }; 
```
{
    
    
    
    
    {
        LOCK(cs_main);
        for (const auto& entry : m_blockman.m_block_index) {
            if (IsWitnessEnabled(entry.second->pprev, params.GetConsensus()) && !(entry.second->nStatus & BLOCK_OPT_WITNESS) && !m_chain.Contains(entry.second)) {
                EraseBlockData(entry.second);
            }
        }
    }
    
    CBlockIndex *tip;
    int nHeight = 1;
    {
        LOCK(cs_main);
        while (nHeight <= m_chain.Height()) {
            
            
            
            if (IsWitnessEnabled(m_chain[nHeight - 1], params.GetConsensus()) && !(m_chain[nHeight]->nStatus & BLOCK_OPT_WITNESS)) {
                break;
            }
            nHeight++;
        }
        tip = m_chain.Tip();
    }