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; 
     }; 
```
#ifndef BITCOIN_PREVECTOR_H
#define BITCOIN_PREVECTOR_H
#include <assert.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <algorithm>
#include <cstddef>
#include <type_traits>