/usr/share/ruby-rails-assets-jquery-slimscroll/app/assets/javascripts/jquery.slimscroll/jquery.slimscroll.js is in ruby-rails-assets-jquery.slimscroll 1.3.6+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/ruby-rails-assets-jquery-slimscroll/app/assets/javascripts/jquery.slimscroll/../../../../../javascript/jquery-slimscroll/jquery.slimscroll.js