[erlang-questions] erlang:phash2(make_ref(), 1 bsl 32)

[Per Melin]

I thought that would be the easiest way to generate an integer unique enough
for my needs. But it seems to always repeat in 2^18 (262144) iterations.

That is because #Ref<_._.X.Y> gives the same phash2 as #Ref<_._.X+1.Y> in
any range between 2^20 and 2^32.

Isn't that a little unfortunate?
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