• adapt patch from Reini Urban to fix failing RV under 5.10 and 5.11. AV
  and HV were pushed directly onto the pending_array, and not the RV,
  which caused #33530. So he rewrote the logic to deref the RV inside
  the array traversal. Applied this with one small omission, which
  caused test faiures.
  
• Fixed 5.11 RV/IV logic. (Thanx Reini Urban!)
  
• Removed one duplicate total_size arrayref test. (Thanx Reini Urban!)
  
• changed //printf to dbg_printf() (Thanx Reini again!)