/usr/lib/ruby/vendor_ruby/active_record/associations/ is in ruby-activerecord-3.2 3.2.16-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/active_record/associations/alias_tracker.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/association_scope.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/belongs_to_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/belongs_to_polymorphic_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/belongs_to.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/collection_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/has_and_belongs_to_many.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/has_many.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/has_one.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/builder/singular_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/collection_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/collection_proxy.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/has_and_belongs_to_many_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/has_many_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/has_many_through_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/has_one_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/has_one_through_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/join_dependency/
/usr/lib/ruby/vendor_ruby/active_record/associations/join_dependency.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/join_dependency/join_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/join_dependency/join_base.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/join_dependency/join_part.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/join_helper.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/belongs_to.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/collection_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/has_and_belongs_to_many.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/has_many.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/has_many_through.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/has_one.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/has_one_through.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/singular_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/preloader/through_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/singular_association.rb
/usr/lib/ruby/vendor_ruby/active_record/associations/through_association.rb