Sidekick crashes after upgrading to 8.3.4
Started seeing quite a few traces like this in the logs:
2016-01-20T02:49:20.840Z 3651 TID-or9lhtx2s WARN: RuntimeError: Circular dependency detected while autoloading constant Banzai::Filter::SyntaxHighlightFilter
2016-01-20T02:49:20.851Z 3651 TID-or9lhtx2s WARN: /local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:492:in `load_missing_constant'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:184:in `const_missing'
/local/git/gitlab/lib/banzai/pipeline/gfm_pipeline.rb:8:in `filters'
/local/git/gitlab/lib/banzai/pipeline/base_pipeline.rb:16:in `html_pipeline'
/local/git/gitlab/lib/banzai/pipeline/base_pipeline.rb:24:in `block (2 levels) in singleton class'
/local/git/gitlab/lib/banzai/renderer.rb:33:in `render_result'
/local/git/gitlab/lib/banzai/renderer.rb:63:in `cacheless_render'
/local/git/gitlab/lib/banzai/renderer.rb:28:in `render'
/local/git/gitlab/lib/banzai/reference_extractor.rb:33:in `analyze'
/local/git/gitlab/lib/gitlab/reference_extractor.rb:18:in `analyze'
/local/git/gitlab/app/models/concerns/mentionable.rb:55:in `block in all_references'
/local/git/gitlab/app/models/concerns/mentionable.rb:52:in `each'
/local/git/gitlab/app/models/concerns/mentionable.rb:52:in `all_references'
/local/git/gitlab/app/models/concerns/mentionable.rb:68:in `referenced_mentionables'
/local/git/gitlab/app/models/concerns/mentionable.rb:79:in `create_cross_references!'
/local/git/gitlab/app/services/git_push_service.rb:98:in `block in process_commit_messages'
/local/git/gitlab/app/services/git_push_service.rb:82:in `each'
/local/git/gitlab/app/services/git_push_service.rb:82:in `process_commit_messages'
/local/git/gitlab/app/services/git_push_service.rb:52:in `execute'
/local/git/gitlab/app/workers/post_receive.rb:41:in `block in perform'
/local/git/gitlab/app/workers/post_receive.rb:28:in `each'
/local/git/gitlab/app/workers/post_receive.rb:28:in `perform'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:150:in `execute_job'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:132:in `block (2 levels) in process'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:127:in `block in invoke'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/active_record.rb:6:in `call'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:129:in `block in invoke'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:129:in `block in invoke'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/logging.rb:30:in `with_context'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/server/logging.rb:7:in `call'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:129:in `block in invoke'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:132:in `call'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/middleware/chain.rb:132:in `invoke'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:127:in `block in process'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:166:in `stats'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:126:in `process'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:79:in `process_one'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/processor.rb:67:in `run'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/util.rb:16:in `watchdog'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/sidekiq-4.0.1/lib/sidekiq/util.rb:24:in `block in safe_thread'
2016-01-20T02:49:20.843Z 3651 TID-or9li27ts WARN: RuntimeError: Circular dependency detected while autoloading constant Banzai::Filter::SyntaxHighlightFilter
2016-01-20T02:49:20.852Z 3651 TID-or9li27ts WARN: /local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:492:in `load_missing_constant'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:184:in `const_missing'
/local/git/gitlab/lib/banzai/pipeline/gfm_pipeline.rb:8:in `filters'
/local/git/gitlab/lib/banzai/pipeline/base_pipeline.rb:16:in `html_pipeline'and similar when generating an email:
2016-01-20T02:51:36.585Z 3651 TID-or9li24zk WARN: {"class"=>"ActiveJob::QueueAdapters::SidekiqAdapter::JobWrapper", "wrapped"=>"ActionMailer::DeliveryJob", "queue"=>"mailers", "args"=>[{"job_cl
ass"=>"ActionMailer::DeliveryJob", "job_id"=>"3645cc6c-ce44-4258-8551-85d4a88b76b9", "queue_name"=>"mailers", "arguments"=>["Notify", "new_merge_request_email", "deliver_now", 57, 2856], "local
e"=>"en"}], "retry"=>true, "jid"=>"8c2ce50d268be1faaab0b9b8", "created_at"=>1453258294.7454336, "enqueued_at"=>1453258294.745493, "error_message"=>"Circular dependency detected while autoloadin
g constant Banzai::Pipeline::EmailPipeline", "error_class"=>"ActionView::Template::Error", "failed_at"=>1453258296.584751, "retry_count"=>0}
2016-01-20T02:51:36.585Z 3651 TID-or9li24zk WARN: ActionView::Template::Error: Circular dependency detected while autoloading constant Banzai::Pipeline::EmailPipeline
2016-01-20T02:51:36.585Z 3651 TID-or9li24zk WARN: /local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:492:in `load_missing_constant'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/dependencies.rb:184:in `const_missing'
/local/git/gitlab/lib/banzai/pipeline.rb:7:in `const_get'
/local/git/gitlab/lib/banzai/pipeline.rb:7:in `[]'
/local/git/gitlab/lib/banzai/renderer.rb:33:in `render_result'
/local/git/gitlab/lib/banzai/renderer.rb:63:in `cacheless_render'
/local/git/gitlab/lib/banzai/renderer.rb:28:in `render'
/local/git/gitlab/lib/banzai.rb:3:in `render'
/local/git/gitlab/app/helpers/gitlab_markdown_helper.rb:53:in `markdown'
/local/git/gitlab/app/views/notify/new_merge_request_email.html.haml:9:in `_app_views_notify_new_merge_request_email_html_haml__709050665571364882_69843399921420'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/template.rb:145:in `block in render'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/notifications.rb:166:in `instrument'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/template.rb:333:in `instrument'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/template.rb:143:in `render'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/template_renderer.rb:54:in `block (2 levels) in render_template'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/activesupport-4.2.4/lib/active_support/notifications.rb:166:in `instrument'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/abstract_renderer.rb:39:in `instrument'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/template_renderer.rb:53:in `block in render_template'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/template_renderer.rb:61:in `render_with_layout'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/template_renderer.rb:52:in `render_template'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/template_renderer.rb:14:in `render'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/renderer.rb:42:in `render_template'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/renderer/renderer.rb:23:in `render'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/rendering.rb:100:in `_render_template'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionview-4.2.4/lib/action_view/rendering.rb:83:in `render_to_body'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionpack-4.2.4/lib/abstract_controller/rendering.rb:25:in `render'
/local/git/gitlab/vendor/bundle/ruby/2.1.0/gems/actionmailer-4.2.4/lib/action_mailer/base.rb:904:in `block in collect_responses'Any suggestions?