Kwalitee Issues


Take a look at the META.yml Spec at (for version 1.4) or (for version 2), and change your META.yml accordingly.

Error: Custom key 'build_requires' must begin with 'x_' or 'X_'. (build_requires) [Validation: 2];Custom key 'configure_requires' must begin with 'x_' or 'X_'. (configure_requires) [Validation: 2];Custom key 'distribution_type' must begin with 'x_' or 'X_'. (distribution_type) [Validation: 2];Custom key 'requires' must begin with 'x_' or 'X_'. (requires) [Validation: 2];Expected a list structure (license) [Validation: 2];Missing mandatory field, 'release_status' (release_status) [Validation: 2]


If you are using Build.PL define the {requires}{perl} = VERSION field. If you are using MakeMaker (Makefile.PL) you should upgrade ExtUtils::MakeMaker to 6.48 and use MIN_PERL_VERSION parameter. Perl::MinimumVersion can help you determine which version of Perl your module needs.


Add a META.json to the distribution. Your buildtool should be able to autogenerate it.


Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.

Error: Set::Object, Set::Object::Weak


List all modules used in the test suite in META.yml test_requires


  • Test::LeakTrace


Add all modules contained in this distribution to the META.yml field 'provides'. Module::Build or Dist::Zilla::Plugin::MetaProvides do this automatically for you.


Name Abstract Version View
Set::Object set of objects and strings 1.41 metacpan
Set::Object::Weak Sets without the referant reference increment metacpan


Name File View
Set::Object::TieArray lib/Set/ metacpan
Set::Object::TieHash lib/Set/ metacpan

Other Files

Changes.pod metacpan
MANIFEST metacpan
META.yml metacpan
Makefile.PL metacpan
README metacpan