/usr/lib/ruby/ is in ruby-gobject-introspection 3.2.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/gobject-introspection/
/usr/lib/ruby/vendor_ruby/gobject-introspection/arg-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/boxed-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/callable-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/collection-reader.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/interface-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/loader.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/object-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/repository.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/struct-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/union-info.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection/version.rb
/usr/lib/ruby/vendor_ruby/gobject-introspection.rb