Rails - Apr 2009 - A bug in sweeper.rb? [was: A frustrating and strange error when config.action_controller.perform_caching = true]

I fired up the debugger and watched the code happen tonight.

The problem occurs if the config.action_controller.perform_caching = true in
your environment. It''s not set to true in development but it is set to
true
in production and staging.

The problem occurs not in my controllers but in sweeping.rb (part of rails).
Rails calls this code for every controller which was instantiated in the
same request ( I think). Running the page it "sweeps" the following
controllers in this order.

#<MatchCommissionedScheduledController:0xb679b4fc>
#<MatchController:0xb61694f8>


The problem is that on the second call to clean up MatchController it pukes.
The code snippets in sweeping.rb  are..

The cleanup is in the following method of sweep.rb

def after(controller)
          callback(:after) if controller.perform_caching
          # Clean up, so that the controller can be collected after this
request
          self.controller = nil
 end



A little later......

  def callback(timing)
            controller_callback_method_name
"#{timing}_#{controller.controller_name.underscore}"
            action_callback_method_name    
"#{controller_callback_method_name}_#{controller.action_name}"

            __send__(controller_callback_method_name) if
respond_to?(controller_callback_method_name, true)
            __send__(action_callback_method_name)     if
respond_to?(action_callback_method_name, true)
  end


The problem is that after the first controller has been cleared controller
is nil when it gets to the callback (even if it''s not nil when it hits
the
after method)

I am not quite sure what is the problem but could this be a bug in
sweeper.rb?

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