SV = RV(0xa88ae8) at 0xa88adc
  REFCNT = 1
  FLAGS = (TEMP,ROK)
  RV = 0xa889bc
  SV = PVMG(0x253aedc) at 0xa889bc
    REFCNT = 1
    FLAGS = (OBJECT,IOK,READONLY,OVERLOAD,pIOK)
    IV = 41565372
    NV = 0
    PV = 0
    STASH = 0x97dea4    "Math::MPFR"