[Pharo-dev] nil pointersTo size

I am curious... what does it mean that nil PointersTo size is a large number? Intuitively I'd have thought the answer would be zero. Pharo build 40196 --> ~101,000 Pharo build 30856 --> ~103,000 Pharo build 20628 --> ~80,000 Squeak 4.5 --> ~40,000 cheers -ben