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; 
     }; 
```
{
    int height = pindexPrev == nullptr ? 0 : pindexPrev->nHeight + 1;
    return (height >= params.SegwitHeight);
}
int GetWitnessCommitmentIndex(const CBlock& block)