module Kernel
  def test
    [1,2,3].map do |t|
      Object
    end
  end
end
p test
  # mruby => t.rb:5: uninitialized constant Object (NameError)
  # ruby => [Object, Object, Object]

module Hoge
  def test
    [1,2,3].map do |t|
      Object
    end
  end
end

class Test
  include Hoge
end

p Test.new.test