/usr/share/perl5/MooseX/ClassAttribute/ is in libmoosex-classattribute-perl 0.29-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/MooseX/ClassAttribute/Meta/
/usr/share/perl5/MooseX/ClassAttribute/Meta/Role/
/usr/share/perl5/MooseX/ClassAttribute/Meta/Role/Attribute.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/
/usr/share/perl5/MooseX/ClassAttribute/Trait/Application/
/usr/share/perl5/MooseX/ClassAttribute/Trait/Application.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Application/ToClass.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Application/ToRole.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Attribute.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Class.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Mixin/
/usr/share/perl5/MooseX/ClassAttribute/Trait/Mixin/HasClassAttributes.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Role/
/usr/share/perl5/MooseX/ClassAttribute/Trait/Role.pm
/usr/share/perl5/MooseX/ClassAttribute/Trait/Role/Composite.pm