From: Hans Mackowiak <lists@...>
Date: 2013-03-20T15:03:43+09:00
Subject: Re: Why was the object_id for true and nil changed in ruby2.0?

your question was already answered at stackoverflow:

>> Seems to be something to do with “flonums” – a technique for speeding up 
floating point calculations on 64-bit: 
github.com/ruby/ruby/blob/v2_0_0_0/include/ruby/ruby.h#L383-431 and 
ruby-forum.com/topic/4404164.

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