Broken performSelector:withObject:afterDelay in RubyMotion 1.22

app_delegate.rb

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    test_perform_selector
    true
  end

  def test_perform_selector
    foo = "bar"
    foo.retain        # Crashes without this
    wait_1_second do
      puts foo
      foo.release     # Crashes without this
    end
  end

  def wait_1_second(&block)
    performSelector("run_block:", withObject:block, afterDelay:1.0)
  end

  def run_block(block)
    block.call
  end
end