On Wednesday, 23 November 2016 at 01:34:23 UTC, Andrei
Alexandrescu wrote:
I'm unclear on what that statistically unsafe default behavior
is - my understanding is it has to do with RNGs being
inadvertently copied. It would be great to formalize that in a
well-explained issue.
I'll see if I can write that up in depth some time soon. TBH
though I think the problem is less about RNGs and more about
stuff like RandomSample and RandomCover (and, in future, random
distributions that have internal state, like a struct
implementing a normal distribution using the Ziggurat algorithm
internally).
It's not so difficult to stop RNG state being copied
inadvertently, but when you have ranges wrapping ranges wrapping
ranges, each containing their own extra state that cannot be
copied by value, things get a bit more complicated.
