Ruby 2.4 - Concord::Public generates protected attr_reader methods?

I have code:

    include Concord::Public.new(:cycle)

and am testing upgrade to Ruby 2.4.0.

Am receiving a new error:

 protected method `cycle' called for #<OE::ObservationRegenerator:0x007f98c4621ec0>

when I refer to .cycle from another class.

My inference is that I am mistaken and that Concord::Public does NOT create public attr_readers but rather protected attr_readers and that this is just now being detected in latest Ruby 2.4.

In addition if I add a public

attr_reader :cycle

To same class, my code now works as before.

@tjchambers I suspect that there is a behavior change for ruby 2.4. I do not consider 2.4 stable enough yet to switch my clients code to it, as soon this is the case I'll naturally port my ecosystem to it and fix this issue.