/usr/lib/ruby/ is in ruby-barby 0.5.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/barby/
/usr/lib/ruby/vendor_ruby/barby/version.rb
/usr/lib/ruby/vendor_ruby/barby/vendor.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/
/usr/lib/ruby/vendor_ruby/barby/outputter/rmagick_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/svg_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/prawn_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/html_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/pdfwriter_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/cairo_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/ascii_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter/png_outputter.rb
/usr/lib/ruby/vendor_ruby/barby/outputter.rb
/usr/lib/ruby/vendor_ruby/barby/barcode.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/
/usr/lib/ruby/vendor_ruby/barby/barcode/code_25_iata.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/code_93.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/code_128.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/code_39.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/ean_13.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/gs1_128.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/upc_supplemental.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/code_25.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/qr_code.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/code_25_interleaved.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/data_matrix.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/bookland.rb
/usr/lib/ruby/vendor_ruby/barby/barcode/ean_8.rb
/usr/lib/ruby/vendor_ruby/barby.rb