config.action_controller.session_options is broken

When used to set something like:

config.action_controller.session_options[:cookie_only] = true

inside, say, production.rb (environment initializer)

raises an error at time of initialization:

undefined method []=' for nil:NilClass

On the other hand, the following form works without any issues:

ActionController::Base.session_options[:cookie_only] = true

but seems to break something in the initialization as it stops the

ActionController::Caching::Sweeper

class from being loaded.

Some context information: Rails Version: 2.3.2 Passenger: 2.1.2