/usr/share/perl5/GO/Handlers/ is in libgo-perl 0.15-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/GO/Handlers/abstract_prolog_writer.pm
/usr/share/perl5/GO/Handlers/abstract_sql_writer.pm
/usr/share/perl5/GO/Handlers/base.pm
/usr/share/perl5/GO/Handlers/go_def.pm
/usr/share/perl5/GO/Handlers/go_ont.pm
/usr/share/perl5/GO/Handlers/go_xref.pm
/usr/share/perl5/GO/Handlers/godb_prestore.pm
/usr/share/perl5/GO/Handlers/lexanalysis.pm
/usr/share/perl5/GO/Handlers/lexanalysis2sql.pm
/usr/share/perl5/GO/Handlers/obj.pm
/usr/share/perl5/GO/Handlers/obj_storable.pm
/usr/share/perl5/GO/Handlers/obj_yaml.pm
/usr/share/perl5/GO/Handlers/obo.pm
/usr/share/perl5/GO/Handlers/obo_godb_flat.pm
/usr/share/perl5/GO/Handlers/obo_html.pm
/usr/share/perl5/GO/Handlers/obo_sxpr.pm
/usr/share/perl5/GO/Handlers/obo_text.pm
/usr/share/perl5/GO/Handlers/obo_xml.pm
/usr/share/perl5/GO/Handlers/owl.pm
/usr/share/perl5/GO/Handlers/owl_to_obo_text.pm
/usr/share/perl5/GO/Handlers/pathlist.pm
/usr/share/perl5/GO/Handlers/prolog.pm
/usr/share/perl5/GO/Handlers/rdf.pm
/usr/share/perl5/GO/Handlers/summary.pm
/usr/share/perl5/GO/Handlers/sxpr.pm
/usr/share/perl5/GO/Handlers/tbl.pm
/usr/share/perl5/GO/Handlers/text_html.pm
/usr/share/perl5/GO/Handlers/xml.pm
/usr/share/perl5/GO/Handlers/xsl_base.pm