For more see https://gitlab.com/yade-dev/trunk/-/merge_requests/621#note_522538615 and !618 Short version: It would really help in debugging of tricky crashes if we had a cmake option to switch between two cast types. This option is unavailable now, we have plenty of mess actually: some macros in [Math.hpp](https://gitlab.com/yade-dev/trunk/-/blob/master/lib/base/Math.hpp#L41) #97, and some uses of static_cast and dynamic_cast in other places. Possible solution to investigate: there may be a way around it, using class `Indexable`. Do integer comparison of index to check if cast can be done + `static_cast` instead of calling `dynamic_cast`. That will be another MR, when I will think it through, how to make it work.