/usr/lib/x86_64-linux-gnu/ is in libclass-date-perl 1.1.15-2build2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.26/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/Date/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/Date/Const.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/Date/Invalid.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/Date/Rel.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/Date.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Class/Date.pod
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Class/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Class/Date/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Class/Date/Date.so