undefined method `protect' for nil:NilClass

[jandjshi]

I am occasionally getting this error in production environment with passenger 2.2.15, Ruby Enterprise Edition 1.8.7 (2010-04-19 patchlevel 253), rails 2.3.5, and param_protected 1.3.1.

NoMethodError (undefined method protect' for nil:NilClass): /opt/ruby/lib/ruby/gems/1.8/gems/param_protected-1.3.1/lib/param_protected/controller_modifications.rb:49:inparams'
haml (3.0.21) lib/sass/plugin/rack.rb:41:in call' passenger (2.2.15) lib/phusion_passenger/rack/request_handler.rb:92:inprocess_request'
passenger (2.2.15) lib/phusion_passenger/abstract_request_handler.rb:207:in main_loop' passenger (2.2.15) lib/phusion_passenger/railz/application_spawner.rb:441:instart_request_handler'
passenger (2.2.15) lib/phusion_passenger/railz/application_spawner.rb:381:in handle_spawn_application' passenger (2.2.15) lib/phusion_passenger/utils.rb:252:insafe_fork'
passenger (2.2.15) lib/phusion_passenger/railz/application_spawner.rb:377:in handle_spawn_application' passenger (2.2.15) lib/phusion_passenger/abstract_server.rb:352:insend'
passenger (2.2.15) lib/phusion_passenger/abstract_server.rb:352:in main_loop' passenger (2.2.15) lib/phusion_passenger/abstract_server.rb:196:instart_synchronously'
passenger (2.2.15) lib/phusion_passenger/abstract_server.rb:163:in start' passenger (2.2.15) lib/phusion_passenger/railz/application_spawner.rb:222:instart'
passenger (2.2.15) lib/phusion_passenger/spawn_manager.rb:253:in spawn_rails_application' passenger (2.2.15) lib/phusion_passenger/abstract_server_collection.rb:126:inlookup_or_add'
passenger (2.2.15) lib/phusion_passenger/spawn_manager.rb:247:in spawn_rails_application' passenger (2.2.15) lib/phusion_passenger/abstract_server_collection.rb:80:insynchronize'