Prime.new is private

[agarie]

The Travis build for Statsample#35 (ruby head) is spitting out an error about calling the private method Prime.new:

/home/travis/.rvm/gems/ruby-head/gems/backports-3.6.4/lib/backports/1.9.1/stdlib/prime.rb:86:in `<class:Prime>': private method `new' called for Prime:Class (NoMethodError)

I'm not sure this is caused by Distribution, but it needs to be investigated.