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; 
     }; 
```
return !(*this == other);
    }
    bool operator<(const prevector<N, T, Size, Diff>& other) const {
        if (size() < other.size()) {
            return true;
        }
        if (size() > other.size()) {
            return false;
        }
        const_iterator b1 = begin();
        const_iterator b2 = other.begin();
        const_iterator e1 = end();
        while (b1 != e1) {
            if ((*b1) < (*b2)) {
                return true;
            }
            if ((*b2) < (*b1)) {
                return false;
            }
            ++b1;
            ++b2;
        }
        return false;
    }
    size_t allocated_memory() const {