# /!\\ FAILSAFE /!\\ error with Rails 2.3.4 **URL:** \ **Category:** Rails\ **Created:** [February 2, 2010, 7:34pm UTC](https://www.ruby-forum.com/t/failsafe-error-with-rails-2-3-4/182783 "2010-02-02T19:34:35Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [February 2, 2010, 7:34pm UTC](https://www.ruby-forum.com/t/failsafe-error-with-rails-2-3-4/182783/1 "2010-02-02T19:34:35Z")
Does anyone know what could be causing this error? I am currently experiencing it when some browser submit a multipart form witha file attached. Thanks! Tom /!\ FAILSAFE /!\ Tue Feb 02 13:28:35 -0500 2010 Status: 500 Internal Server Error no marshal\_dump is defined for class Proc /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ activesupport-2.3.4/lib/active\_support/message\_verifier.rb:36:in `dump' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ activesupport-2.3.4/lib/active_support/message_verifier.rb:36:in`generate’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ actionpack-2.3.4/lib/action\_controller/session/cookie\_store.rb:151:in `marshal' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ actionpack-2.3.4/lib/action_controller/session/cookie_store.rb:100:in`call’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ actionpack-2.3.4/lib/action\_controller/failsafe.rb:26:in `call' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/vendor/rack-1.0.0-git/lib/rack/lock.rb:11:in`call’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/vendor/rack-1.0.0-git/lib/rack/lock.rb:11:in `synchronize' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/vendor/rack-1.0.0-git/lib/rack/lock.rb:11:in`call’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ actionpack-2.3.4/lib/action\_controller/dispatcher.rb:106:in `call' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/rack/request_handler.rb:91:in`process\_request’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/abstract\_request\_handler.rb: 206:in `main_loop' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/railz/application_spawner.rb: 376:in`start\_request\_handler’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/railz/application\_spawner.rb: 334:in `handle_spawn_application' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/utils.rb:182:in`safe\_fork’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/railz/application\_spawner.rb: 332:in `handle_spawn_application' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/abstract_server.rb:351:in` **send** ’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/abstract\_server.rb:351:in `main_loop' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/abstract_server.rb:195:in`start\_synchronously’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/abstract\_server.rb:162:in `start' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/railz/application_spawner.rb: 213:in`start’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/spawn\_manager.rb:261:in `spawn_rails_application' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/abstract_server_collection.rb: 126:in`lookup\_or\_add’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/spawn\_manager.rb:255:in `spawn_rails_application' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/abstract_server_collection.rb: 80:in`synchronize’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/abstract\_server\_collection.rb: 79:in `synchronize' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb:254:in`spawn\_rails\_application’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/spawn\_manager.rb:153:in `spawn_application' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb:286:in`handle\_spawn\_application’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/abstract\_server.rb:351:in ` __send__' /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion_passenger/abstract_server.rb:351:in`main\_loop’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/lib/phusion\_passenger/abstract\_server.rb:195:in `start\_synchronously’ /opt/ruby-enterprise-1.8.6-20090201/lib/ruby/gems/1.8/gems/ passenger-2.2.4/bin/passenger-spawn-server:61 ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [February 2, 2010, 7:37pm UTC](https://www.ruby-forum.com/t/failsafe-error-with-rails-2-3-4/182783/2 "2010-02-02T19:37:31Z")
On Feb 2, 6:33 pm, TomRossi7 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Does anyone know what could be causing this error? I am currently > experiencing it when some browser submit a multipart form witha file > attached. Somewhere you are trying to serialize a Proc object (looks like you’re trying to put one in the session). Fred ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [February 2, 2010, 8:37pm UTC](https://www.ruby-forum.com/t/failsafe-error-with-rails-2-3-4/182783/3 "2010-02-02T20:37:14Z")
Interesting! I’ve found the problem, but not the fix. I was store my ActiveRecord errors in the flash as shown below: flash.now[:errors]= @object.errors This apparently causes problems when you are using PaperClip and there is a validation issue. It may be trying to put the file in the ActiveRecord Errors object. I’m just going to have to change how I do my flash error messages… Thanks! Tom On Tue, Feb 2, 2010 at 1:36 PM, Frederick C. \