/usr/lib/perl5/XML/LibXML/ is in libxml-libxml-perl 1.89+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/perl5/XML/LibXML/Attr.pod
/usr/lib/perl5/XML/LibXML/Boolean.pm
/usr/lib/perl5/XML/LibXML/CDATASection.pod
/usr/lib/perl5/XML/LibXML/Comment.pod
/usr/lib/perl5/XML/LibXML/Common.pm
/usr/lib/perl5/XML/LibXML/Common.pod
/usr/lib/perl5/XML/LibXML/DOM.pod
/usr/lib/perl5/XML/LibXML/Devel.pm
/usr/lib/perl5/XML/LibXML/Document.pod
/usr/lib/perl5/XML/LibXML/DocumentFragment.pod
/usr/lib/perl5/XML/LibXML/Dtd.pod
/usr/lib/perl5/XML/LibXML/Element.pod
/usr/lib/perl5/XML/LibXML/ErrNo.pm
/usr/lib/perl5/XML/LibXML/ErrNo.pod
/usr/lib/perl5/XML/LibXML/Error.pm
/usr/lib/perl5/XML/LibXML/Error.pod
/usr/lib/perl5/XML/LibXML/InputCallback.pod
/usr/lib/perl5/XML/LibXML/Literal.pm
/usr/lib/perl5/XML/LibXML/Namespace.pod
/usr/lib/perl5/XML/LibXML/Node.pod
/usr/lib/perl5/XML/LibXML/NodeList.pm
/usr/lib/perl5/XML/LibXML/Number.pm
/usr/lib/perl5/XML/LibXML/PI.pod
/usr/lib/perl5/XML/LibXML/Parser.pod
/usr/lib/perl5/XML/LibXML/Pattern.pod
/usr/lib/perl5/XML/LibXML/Reader.pm
/usr/lib/perl5/XML/LibXML/Reader.pod
/usr/lib/perl5/XML/LibXML/RegExp.pod
/usr/lib/perl5/XML/LibXML/RelaxNG.pod
/usr/lib/perl5/XML/LibXML/SAX/
/usr/lib/perl5/XML/LibXML/SAX.pm
/usr/lib/perl5/XML/LibXML/SAX.pod
/usr/lib/perl5/XML/LibXML/SAX/Builder.pm
/usr/lib/perl5/XML/LibXML/SAX/Builder.pod
/usr/lib/perl5/XML/LibXML/SAX/Generator.pm
/usr/lib/perl5/XML/LibXML/SAX/Parser.pm
/usr/lib/perl5/XML/LibXML/Schema.pod
/usr/lib/perl5/XML/LibXML/Text.pod
/usr/lib/perl5/XML/LibXML/XPathContext.pm
/usr/lib/perl5/XML/LibXML/XPathContext.pod
/usr/lib/perl5/XML/LibXML/XPathExpression.pod