SV = IV(0x52c970) at 0x529a58
  REFCNT = 1
  FLAGS = (IOK,pIOK)
  IV = 123
SV = PVIV(0x507848) at 0x529a58
  REFCNT = 1
  FLAGS = (IOK,POK,pIOK,pPOK)
  IV = 123
  PV = 0x508848 "123"\0
  CUR = 3
  LEN = 8