在我为我的 heroku 应用程序设置新的遗物后，我遇到了这个奇怪的错误。它以前工作得很好，但现在它给了我这个错误 - 有人知道吗？它将我发送到 heroku 500 错误页面，附加代码来自 heroku 日志。
Sep 07 02:11:10 gyms heroku/router: at=info method=HEAD path=/ host=gyms.herokuapp.com fwd="50.31.164.139" dyno=web.1 connect=1ms service=36ms status=200 bytes=0
Sep 07 02:11:27 gyms heroku/router: at=info method=HEAD path=/ host=gyms.herokuapp.com fwd="50.112.95.211" dyno=web.1 connect=1ms service=5ms status=200 bytes=0
Sep 07 02:11:48 gyms heroku/router: at=info method=HEAD path=/ host=gyms.herokuapp.com fwd="50.18.57.7" dyno=web.1 connect=1ms service=5ms status=200 bytes=0
Sep 07 02:12:12 gyms heroku/api: Starting process with command `bundle exec rake db:migrate` by sabatsuk@gmail.com
Sep 07 02:12:18 gyms heroku/api: Starting process with command `bundle exec rake db:migrate` by sabatsuk@gmail.com
Sep 07 02:12:24 gyms heroku/router: at=info method=HEAD path=/ host=gyms.herokuapp.com fwd="184.73.237.85" dyno=web.1 connect=1ms service=7ms status=200 bytes=0
Sep 07 02:12:29 gyms heroku/run.9767: Awaiting client
Sep 07 02:12:30 gyms heroku/run.2092: Awaiting client
Sep 07 02:12:30 gyms heroku/run.2092: Starting process with command `bundle exec rake db:migrate`
Sep 07 02:12:34 gyms heroku/run.2092: Process exited with status 0
Sep 07 02:12:34 gyms heroku/run.2092: State changed from up to complete
Sep 07 02:12:39 gyms heroku/run.9767: Error R99 (Platform error) -> Failed to launch the dyno within 10 seconds
Sep 07 02:12:39 gyms heroku/run.9767: Stopping process with SIGKILL
Sep 07 02:12:40 gyms heroku/run.9767: State changed from starting to complete
Sep 07 02:12:43 gyms app/web.1: Started GET "/memberships" for 109.65.193.237 at 2013-09-07 09:12:42 +0000
Sep 07 02:12:43 gyms heroku/router: at=info method=GET path=/memberships host=gyms.herokuapp.com fwd="109.65.193.237" dyno=web.1 connect=0ms service=13ms status=500 bytes=643
Sep 07 02:12:43 gyms app/web.1: NoMethodError (undefined method `empty?' for nil:NilClass):
Sep 07 02:12:43 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_view/lookup_context.rb:145:in `detail_args_for'
Sep 07 02:12:43 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_view/lookup_context.rb:109:in `find'
Sep 07 02:12:43 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_view/renderer/abstract_renderer.rb:3:in `find_template'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/agent/instrumentation/rails3/action_controller.rb:153:in `render_with_newrelic'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_view/renderer/renderer.rb:36:in `render_template'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_view/renderer/renderer.rb:17:in `render'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/rendering.rb:110:in `_render_template'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_view/renderer/template_renderer.rb:34:in `determine_template'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/streaming.rb:225:in `_render_template'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/rendering.rb:103:in `render_to_body'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/renderers.rb:28:in `render_to_body'
Sep 07 02:12:44 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/compatibility.rb:50:in `render_to_body'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/rendering.rb:88:in `render'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/core_ext/benchmark.rb:5:in `block in ms'
Sep 07 02:12:45 gyms app/web.1: vendor/ruby-2.0.0/lib/ruby/2.0.0/benchmark.rb:296:in `realtime'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/rendering.rb:16:in `render'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/core_ext/benchmark.rb:5:in `ms'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/instrumentation.rb:40:in `block in render'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/instrumentation.rb:83:in `cleanup_view_runtime'
Sep 07 02:12:45 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.11/lib/active_record/railties/controller_runtime.rb:24:in `cleanup_view_runtime'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/responder.rb:232:in `default_render'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/responder.rb:160:in `to_html'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/responders-1.0.0.rc/lib/responders/flash_responder.rb:104:in `to_html'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/responder.rb:153:in `respond'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/responder.rb:146:in `call'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/mime_responds.rb:239:in `respond_with'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/inherited_resources-1.4.1/lib/inherited_resources/actions.rb:7:in `index'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/base.rb:167:in `process_action'
Sep 07 02:12:46 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/rendering.rb:10:in `process_action'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/callbacks.rb:18:in `block in process_action'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:414:in `_run__647810640918505021__process_action__383065631445966333__callbacks'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:405:in `__run_callback'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:81:in `run_callbacks'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/callbacks.rb:17:in `process_action'
Sep 07 02:12:47 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/notifications.rb:123:in `block in instrument'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/notifications.rb:123:in `instrument'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/instrumentation.rb:29:in `process_action'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.11/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/agent/instrumentation/rails3/action_controller.rb:34:in `block in process_action'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:268:in `block in perform_action_with_newrelic_trace'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/agent/method_tracer.rb:242:in `trace_execution_scoped'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:263:in `perform_action_with_newrelic_trace'
Sep 07 02:12:48 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/agent/instrumentation/rails3/action_controller.rb:33:in `process_action'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/abstract_controller/base.rb:121:in `process'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal.rb:203:in `dispatch'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_controller/metal.rb:246:in `block in action'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/routing/route_set.rb:73:in `call'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/routing/route_set.rb:36:in `call'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/journey-1.0.4/lib/journey/router.rb:68:in `block in call'
Sep 07 02:12:49 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/journey-1.0.4/lib/journey/router.rb:56:in `each'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/journey-1.0.4/lib/journey/router.rb:56:in `call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/routing/route_set.rb:601:in `call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/rack/error_collector.rb:8:in `call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/newrelic_rpm-3.5.4.34/lib/new_relic/rack/browser_monitoring.rb:12:in `call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:35:in `block in call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `catch'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
Sep 07 02:12:50 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/conditionalget.rb:25:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/head.rb:14:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/params_parser.rb:21:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/flash.rb:242:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/session/abstract/id.rb:210:in `context'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/session/abstract/id.rb:205:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.11/lib/active_record/query_cache.rb:64:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
Sep 07 02:12:51 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:405:in `_run__4253927515509182332__call__656494683648414723__callbacks'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:405:in `__run_callback'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:81:in `run_callbacks'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/railties-3.2.11/lib/rails/rack/logger.rb:32:in `call_app'
Sep 07 02:12:52 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/railties-3.2.11/lib/rails/rack/logger.rb:16:in `block in call'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/tagged_logging.rb:22:in `tagged'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/railties-3.2.11/lib/rails/rack/logger.rb:16:in `call'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/actionpack-3.2.11/lib/action_dispatch/middleware/request_id.rb:22:in `call'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/methodoverride.rb:21:in `call'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/activesupport-3.2.11/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/lock.rb:15:in `call'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-cache-1.2/lib/rack/cache/context.rb:136:in `forward'
Sep 07 02:12:53 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-cache-1.2/lib/rack/cache/context.rb:245:in `fetch'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-cache-1.2/lib/rack/cache/context.rb:185:in `lookup'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-cache-1.2/lib/rack/cache/context.rb:66:in `call!'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-cache-1.2/lib/rack/cache/context.rb:51:in `call'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/railties-3.2.11/lib/rails/engine.rb:479:in `call'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/railties-3.2.11/lib/rails/application.rb:223:in `call'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/content_length.rb:14:in `call'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/railties-3.2.11/lib/rails/rack/log_tailer.rb:17:in `call'
Sep 07 02:12:54 gyms app/web.1: vendor/bundle/ruby/2.0.0/gems/rack-1.4.5/lib/rack/handler/webrick.rb:59:in `service'
Sep 07 02:12:54 gyms app/web.1: vendor/ruby-2.0.0/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service'
Sep 07 02:12:54 gyms app/web.1: vendor/ruby-2.0.0/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run'
Sep 07 02:12:55 gyms app/web.1: vendor/ruby-2.0.0/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'
Sep 07 02:12:55 gyms app/web.1: Processing by MembershipsController#index as HTML
Sep 07 02:12:55 gyms app/web.1: Completed 500 Internal Server Error in 1ms