ArgumentError (comparison of String with Time failed)

[jimjin]

ArgumentError (comparison of String with Time failed):
/Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/gems/1.9.1/bundler/gems/rubycas-client-195a4b703330/lib/casclient/frameworks/rails/filter.rb:258:in >' /Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/gems/1.9.1/bundler/gems/rubycas-client-195a4b703330/lib/casclient/frameworks/rails/filter.rb:258:inredirect_to_cas_for_authentication'
/Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/gems/1.9.1/bundler/gems/rubycas-client-195a4b703330/lib/casclient/frameworks/rails/filter.rb:243:in unauthorized!' /Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/gems/1.9.1/bundler/gems/rubycas-client-195a4b703330/lib/casclient/frameworks/rails/filter.rb:129:infilter'
/Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/gems/1.9.1/bundler/gems/rubycas-client-195a4b703330/lib/casclient/frameworks/rails/filter.rb:15:in before' activesupport (4.1.6) lib/active_support/callbacks.rb:447:inpublic_send'
activesupport (4.1.6) lib/active_support/callbacks.rb:447:in block in make_lambda' activesupport (4.1.6) lib/active_support/callbacks.rb:160:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:160:in block in halting' activesupport (4.1.6) lib/active_support/callbacks.rb:229:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:229:in block in halting' activesupport (4.1.6) lib/active_support/callbacks.rb:229:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:229:in block in halting' activesupport (4.1.6) lib/active_support/callbacks.rb:166:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in block in halting' activesupport (4.1.6) lib/active_support/callbacks.rb:166:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in block in halting' activesupport (4.1.6) lib/active_support/callbacks.rb:166:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:166:in block in halting' activesupport (4.1.6) lib/active_support/callbacks.rb:86:incall'
activesupport (4.1.6) lib/active_support/callbacks.rb:86:in run_callbacks' actionpack (4.1.6) lib/abstract_controller/callbacks.rb:19:inprocess_action'
actionpack (4.1.6) lib/action_controller/metal/rescue.rb:29:in process_action' actionpack (4.1.6) lib/action_controller/metal/instrumentation.rb:31:inblock in process_action'
activesupport (4.1.6) lib/active_support/notifications.rb:159:in block in instrument' activesupport (4.1.6) lib/active_support/notifications/instrumenter.rb:20:ininstrument'
activesupport (4.1.6) lib/active_support/notifications.rb:159:in instrument' actionpack (4.1.6) lib/action_controller/metal/instrumentation.rb:30:inprocess_action'
actionpack (4.1.6) lib/action_controller/metal/params_wrapper.rb:250:in process_action' activerecord (4.1.6) lib/active_record/railties/controller_runtime.rb:18:inprocess_action'
actionpack (4.1.6) lib/abstract_controller/base.rb:136:in process' actionview (4.1.6) lib/action_view/rendering.rb:30:inprocess'
actionpack (4.1.6) lib/action_controller/metal.rb:196:in dispatch' actionpack (4.1.6) lib/action_controller/metal/rack_delegation.rb:13:indispatch'
actionpack (4.1.6) lib/action_controller/metal.rb:232:in block in action' actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:82:incall'
actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:82:in dispatch' actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:50:incall'
actionpack (4.1.6) lib/action_dispatch/journey/router.rb:73:in block in call' actionpack (4.1.6) lib/action_dispatch/journey/router.rb:59:ineach'
actionpack (4.1.6) lib/action_dispatch/journey/router.rb:59:in call' actionpack (4.1.6) lib/action_dispatch/routing/route_set.rb:678:incall'
warden (1.2.3) lib/warden/manager.rb:35:in block in call' warden (1.2.3) lib/warden/manager.rb:34:incatch'
warden (1.2.3) lib/warden/manager.rb:34:in call' rack (1.5.5) lib/rack/etag.rb:23:incall'
rack (1.5.5) lib/rack/conditionalget.rb:25:in call' rack (1.5.5) lib/rack/head.rb:11:incall'
actionpack (4.1.6) lib/action_dispatch/middleware/params_parser.rb:27:in call' actionpack (4.1.6) lib/action_dispatch/middleware/flash.rb:254:incall'
rack (1.5.5) lib/rack/session/abstract/id.rb:225:in context' rack (1.5.5) lib/rack/session/abstract/id.rb:220:incall'
actionpack (4.1.6) lib/action_dispatch/middleware/cookies.rb:560:in call' activerecord (4.1.6) lib/active_record/query_cache.rb:36:incall'
activerecord (4.1.6) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in call' activerecord (4.1.6) lib/active_record/migration.rb:380:incall'
actionpack (4.1.6) lib/action_dispatch/middleware/callbacks.rb:29:in block in call' activesupport (4.1.6) lib/active_support/callbacks.rb:82:inrun_callbacks'
actionpack (4.1.6) lib/action_dispatch/middleware/callbacks.rb:27:in call' actionpack (4.1.6) lib/action_dispatch/middleware/reloader.rb:73:incall'
actionpack (4.1.6) lib/action_dispatch/middleware/remote_ip.rb:76:in call' actionpack (4.1.6) lib/action_dispatch/middleware/debug_exceptions.rb:17:incall'
actionpack (4.1.6) lib/action_dispatch/middleware/show_exceptions.rb:30:in call' railties (4.1.6) lib/rails/rack/logger.rb:38:incall_app'
railties (4.1.6) lib/rails/rack/logger.rb:20:in block in call' activesupport (4.1.6) lib/active_support/tagged_logging.rb:68:inblock in tagged'
activesupport (4.1.6) lib/active_support/tagged_logging.rb:26:in tagged' activesupport (4.1.6) lib/active_support/tagged_logging.rb:68:intagged'
railties (4.1.6) lib/rails/rack/logger.rb:20:in call' actionpack (4.1.6) lib/action_dispatch/middleware/request_id.rb:21:incall'
rack (1.5.5) lib/rack/methodoverride.rb:21:in call' rack (1.5.5) lib/rack/runtime.rb:17:incall'
activesupport (4.1.6) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in call' rack (1.5.5) lib/rack/lock.rb:17:incall'
actionpack (4.1.6) lib/action_dispatch/middleware/static.rb:64:in call' rack (1.5.5) lib/rack/sendfile.rb:112:incall'
railties (4.1.6) lib/rails/engine.rb:514:in call' railties (4.1.6) lib/rails/application.rb:144:incall'
rack (1.5.5) lib/rack/lock.rb:17:in call' rack (1.5.5) lib/rack/content_length.rb:14:incall'
rack (1.5.5) lib/rack/handler/webrick.rb:60:in service' /Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/1.9.1/webrick/httpserver.rb:138:inservice'
/Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/1.9.1/webrick/httpserver.rb:94:in run' /Users/kingjim/.rbenv/versions/1.9.3-p547/lib/ruby/1.9.1/webrick/server.rb:191:inblock in start_thread'