Perplexing Keyword Args

gistfile1.rb

class MM
  def method_missing(method, *args, **kargs)
    puts method.inspect
    puts args.inspect
    puts kargs.inspect
  end
end

MM.new.foo({ foo: 'bar' }, one: 1)
# => :foo
#    [{:foo=>"bar"}]
#    {:one=>1}

MM.new.foo({ foo: 'bar' })
# => :foo
#    []
#    {:foo=>"bar"}

# In the second case, I would expect the hash to be the first `arg` and `kargs`to be an empty hash.