/usr/lib/ruby/vendor_ruby/ is in ruby-log4r 1.1.9-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/log4r/
/usr/lib/ruby/vendor_ruby/log4r/lib/
/usr/lib/ruby/vendor_ruby/log4r/lib/xmlloader.rb
/usr/lib/ruby/vendor_ruby/log4r/lib/drbloader.rb
/usr/lib/ruby/vendor_ruby/log4r/rdoc/
/usr/lib/ruby/vendor_ruby/log4r/rdoc/GDC
/usr/lib/ruby/vendor_ruby/log4r/rdoc/MDC
/usr/lib/ruby/vendor_ruby/log4r/rdoc/NDC
/usr/lib/ruby/vendor_ruby/log4r/rdoc/log4r
/usr/lib/ruby/vendor_ruby/log4r/rdoc/yamlconfigurator
/usr/lib/ruby/vendor_ruby/log4r/rdoc/configurator
/usr/lib/ruby/vendor_ruby/log4r/rdoc/win32eventoutputter
/usr/lib/ruby/vendor_ruby/log4r/rdoc/logserver
/usr/lib/ruby/vendor_ruby/log4r/rdoc/logger
/usr/lib/ruby/vendor_ruby/log4r/rdoc/emailoutputter
/usr/lib/ruby/vendor_ruby/log4r/rdoc/formatter
/usr/lib/ruby/vendor_ruby/log4r/rdoc/patternformatter
/usr/lib/ruby/vendor_ruby/log4r/rdoc/syslogoutputter
/usr/lib/ruby/vendor_ruby/log4r/rdoc/outputter
/usr/lib/ruby/vendor_ruby/log4r/GDC.rb
/usr/lib/ruby/vendor_ruby/log4r/MDC.rb
/usr/lib/ruby/vendor_ruby/log4r/NDC.rb
/usr/lib/ruby/vendor_ruby/log4r/staticlogger.rb
/usr/lib/ruby/vendor_ruby/log4r/config.rb
/usr/lib/ruby/vendor_ruby/log4r/loggerfactory.rb
/usr/lib/ruby/vendor_ruby/log4r/logserver.rb
/usr/lib/ruby/vendor_ruby/log4r/logger.rb
/usr/lib/ruby/vendor_ruby/log4r/repository.rb
/usr/lib/ruby/vendor_ruby/log4r/logevent.rb
/usr/lib/ruby/vendor_ruby/log4r/formatter/
/usr/lib/ruby/vendor_ruby/log4r/formatter/patternformatter.rb
/usr/lib/ruby/vendor_ruby/log4r/formatter/formatter.rb
/usr/lib/ruby/vendor_ruby/log4r/formatter/log4jxmlformatter.rb
/usr/lib/ruby/vendor_ruby/log4r/yamlconfigurator.rb
/usr/lib/ruby/vendor_ruby/log4r/base.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/
/usr/lib/ruby/vendor_ruby/log4r/outputter/datefileoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/iooutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/outputterfactory.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/syslogoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/remoteoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/fileoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/staticoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/outputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/udpoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/rollingfileoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/consoleoutputters.rb
/usr/lib/ruby/vendor_ruby/log4r/outputter/emailoutputter.rb
/usr/lib/ruby/vendor_ruby/log4r/configurator.rb
/usr/lib/ruby/vendor_ruby/log4r.rb