undefined method `map' for nil:NilClass after upgrading to Rails 5

[codalicious]

After upgrading to Rails 5 I'm getting the following error in my mailer when calling mail method: undefined method map for nil:NilClass Did you mean? tap Any ideas on what could be the issue here? thanks!

[tadman]

Do you have a full stack-trace available? I'm not able to reproduce this, and all tests on Travis are passing, so it's possible there's an oversight in our coverage.

[codalicious]

Sure, here it is

undefined method `map' for nil:NilClass
Did you mean?  tap
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/base.rb:916:in `collect_responses_from_templates'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/base.rb:908:in `collect_responses'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/postageapp-1.2.5/lib/postageapp/mailer/mailer_4.rb:163:in `mail'
/home/deploy/project/app/mailers/user_mailer.rb:20:in `purchase_receipt'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/base.rb:188:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:97:in `__run_callbacks__'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:90:in `run_callbacks'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/callbacks.rb:19:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/base.rb:126:in `process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/rescuable.rb:23:in `block in process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/rescuable.rb:15:in `handle_exceptions'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/rescuable.rb:22:in `process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionview-5.0.0/lib/action_view/rendering.rb:30:in `process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/base.rb:595:in `block in process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/notifications.rb:164:in `block in instrument'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/notifications.rb:164:in `instrument'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/base.rb:594:in `process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/message_delivery.rb:105:in `block in processed_mailer'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/message_delivery.rb:104:in `tap'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/message_delivery.rb:104:in `processed_mailer'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionmailer-5.0.0/lib/action_mailer/message_delivery.rb:95:in `deliver_now'
/home/deploy/project/app/services/stripe_charger.rb:114:in `charge!'
/home/deploy/project/app/controllers/api/v2/store_controller.rb:36:in `create'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/base.rb:188:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal/rendering.rb:30:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:126:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:455:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:101:in `__run_callbacks__'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:90:in `run_callbacks'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/callbacks.rb:19:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal/rescue.rb:20:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/notifications.rb:164:in `block in instrument'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/notifications.rb:164:in `instrument'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal/params_wrapper.rb:248:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.0/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/abstract_controller/base.rb:126:in `process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionview-5.0.0/lib/action_view/rendering.rb:30:in `process'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal.rb:190:in `dispatch'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_controller/metal.rb:262:in `dispatch'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/routing/route_set.rb:32:in `serve'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/journey/router.rb:39:in `block in serve'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/journey/router.rb:26:in `each'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/journey/router.rb:26:in `serve'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/routing/route_set.rb:725:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bullet-5.2.0/lib/bullet/rack.rb:10:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/etag.rb:25:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/conditional_get.rb:38:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/head.rb:12:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/session/abstract/id.rb:222:in `context'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/session/abstract/id.rb:216:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/cookies.rb:613:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.0/lib/active_record/migration.rb:552:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:97:in `__run_callbacks__'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/callbacks.rb:90:in `run_callbacks'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/callbacks.rb:36:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/executor.rb:12:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/better_errors-2.1.1/lib/better_errors/middleware.rb:59:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0/lib/rails/rack/logger.rb:36:in `call_app'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0/lib/rails/rack/logger.rb:24:in `block in call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/tagged_logging.rb:70:in `block in tagged'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/tagged_logging.rb:26:in `tagged'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/tagged_logging.rb:70:in `tagged'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0/lib/rails/rack/logger.rb:24:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/request_id.rb:24:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/method_override.rb:22:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/runtime.rb:22:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/executor.rb:12:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/actionpack-5.0.0/lib/action_dispatch/middleware/static.rb:136:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/sendfile.rb:111:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-cors-0.4.0/lib/rack/cors.rb:80:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0/lib/rails/engine.rb:522:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/configuration.rb:225:in `call'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/server.rb:578:in `handle_request'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/server.rb:415:in `process_client'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/server.rb:275:in `block in run'
/home/vagrant/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/thread_pool.rb:116:in `block in spawn_thread'
UserMailer#purchase_receipt: processed outbound mail in 126.2ms

[tadman]

Thanks for the specifics. I'll work on making a test case that reproduces this.

[codalicious]

Great, thank you.

[tadman]

Version 1.2.6 of this, which I've just pushed live, should fix this problem. Let me know if it works for you.

[JovicaSusa]

Hi @tadman, @codalicious colleague here, just tried v.1.2.6 and everything works fine. Thanks

[codalicious]

@tadman just to confirm that Version 1.2.6 fixed the issue. Thank you