simplified.rb

require 'active_record'
Bundler.require :default

require 'objspace'
ObjectSpace.trace_object_allocations_start

def iter n
  if n > 0
    1.times{
      iter(n-1)
    }
  else
    # null code
  end
end

def gc
  iter(100)
  GC.start
  GC.start
end


class TestClass
  def foo
    require 'net/telnet'
  end
end

def do_the_thing
  x = TestClass.new
  x.foo
  nil
end

do_the_thing

# This fixes it:
#require 'net/smtp'

gc

n = Hash.new(0); ObjectSpace.each_object(TestClass) {|o| n[o.class.name] += 1 }; p Hash[n.sort]

gc
puts ObjectSpace.dump_all.path