/usr/lib/ruby/ is in ruby-devise-async 0.9.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/devise/
/usr/lib/ruby/vendor_ruby/devise-async.rb
/usr/lib/ruby/vendor_ruby/devise/async/
/usr/lib/ruby/vendor_ruby/devise/async.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/
/usr/lib/ruby/vendor_ruby/devise/async/backend.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/base.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/delayed_job.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/queue_classic.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/resque.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/sidekiq.rb
/usr/lib/ruby/vendor_ruby/devise/async/backend/torquebox.rb
/usr/lib/ruby/vendor_ruby/devise/async/model.rb
/usr/lib/ruby/vendor_ruby/devise/async/version.rb
/usr/lib/ruby/vendor_ruby/devise/async/worker.rb