method_missing always gets a block

[Asmod4n]

When method_missing gets triggered it always gets a block, even when not passed.

class MissingError
  def method_missing(method, *args, &block)
    if block_given?
      puts "block_given?"
    end
    if block
      puts "block"
    end
  end
end

missing_error = MissingError.new
missing_error.hello

Expected result would be nothing, but both assume a block gets passed.