Algorithm-RabinKarp 0.41 Latest
Take a look at the META.yml Spec at https://metacpan.org/pod/CPAN::Meta::History::Meta_1_4 (for version 1.4) or https://metacpan.org/pod/CPAN::Meta::Spec (for version 2), and change your META.yml accordingly.
Error: '<undef>' for 'bignum' is not a valid version. (recommends -> bignum) [Validation: 1.2]
Add a README to the distribution. It should contain a quick description of your module and how to install it.
Add a section called "LICENSE" to the documentation, or add a file named LICENSE to the distribution.
Add =head1 LICENSE and the text of the license to the main module in your code.
Add 'use strict' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules are strictly written.
Remove the POD errors. You can check for POD errors automatically by including Test::Pod to your test suite.
Error: Algorithm-RabinKarp-0.41/lib/Algorithm/RabinKarp/Util.pm -- Around line 13: You can't have =items (as at line 19) unless the first thing after the =over is an =item
Add a META.json to the distribution. Your buildtool should be able to autogenerate it.
Add =head1 LICENSE and/or the proper text of the well-known license to the main module in your code.
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.
Add a 'repository' resource to the META.yml via 'meta_add' accessor (for Module::Build) or META_ADD parameter (for ExtUtils::MakeMaker).
This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.