JRuby 9k double loading file if explicit require and autoload are used

double_load.rb

autoload :ProxyObject, 'proxy_object.rb'
require 'proxy_object'

output

$ jruby double_load.rb 
NameError: Undefined method == for class 'ProxyObject'
  undef_method at org/jruby/RubyModule.java:2439
        (root) at /home/bbrowning/tmp/jruby9kdoubleload/proxy_object.rb:2
        (root) at /home/bbrowning/.rbenv/versions/jruby-9.0.0.0-pre1/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:1
       require at org/jruby/RubyKernel.java:954
       require at /home/bbrowning/.rbenv/versions/jruby-9.0.0.0-pre1/lib/ruby/stdlib/rubygems/core_ext/kernel_require.rb:54
    __script__ at double_load.rb:2

proxy_object.rb

class ProxyObject < ::BasicObject
  undef_method :==
end