Attempt at ensuring a test takes at most four seconds before failing

backtrace

/Users/joshuaclayton/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/formatters/base_text_formatter.rb:181:in `dump_failure_info': You have a nil object when you didn't expect it! (NoMethodError)
You might have expected an instance of Array.
The error occurred while evaluating nil.<<

gistfile1.rb

  around do |example|
    begin
      Timeout::timeout(4) do
        example.run
      end
    rescue Timeout::Error => e
      fail 'Test took too long to complete'
    end
  end