[rails5] DEPRECATION WARNING: alias_method_chain is deprecated. Please, use Module#prepend instead.
When running any rake command with rails 5, a deprecation warning is displayed:
$ bundle exec rake db:schema:dump
DEPRECATION WARNING: alias_method_chain is deprecated. Please, use Module#prepend instead. From module, you can access the original method using super. (called from <top (required)> at /home/honza/gitlab-development-kit/gitlab/config/application.rb:5)
The reason is that peek-sidekiq
gem uses alias_method_chain
which is deprecated in rails 5 (and removed in 5.1).
This gem doesn't seem to be maintained anymore, this issue was reported few year ago including a fix - https://github.com/suranyami/peek-sidekiq/issues/3
We should either remove the gem, or fork/fix the gem ourselves (or monkey patch it).