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: License 'gpl2' is invalid (license) [Validation: 1.4]


Change the permissions of Build.PL/Makefile.PL to not-executable.


Run a proper command ("make manifest" or "./Build manifest", maybe with a force option), or use a distribution builder to generate the MANIFEST. Or update MANIFEST manually.


  • MANIFEST (141) does not match dist (140):
  • Duplicates in MANIFEST: t/results/reset_newlines_at_beginning.stdout


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: Mail::Mbox::MessageParser, Mail::Mbox::MessageParser::Cache, Mail::Mbox::MessageParser::Config, Mail::Mbox::MessageParser::Grep, Mail::Mbox::MessageParser::MetaInfo, Mail::Mbox::MessageParser::Perl


Split the distribution, or fix the version numbers to make them consistent (use the highest version number to avoid version downgrade).

Error: 0.0102,0.0200,1.3002,1.5111,1.6005,1.7005


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
Mail::Mbox::MessageParser A fast and simple mbox folder reader 1.5111 metacpan
Mail::Mbox::MessageParser::Cache A cache-based mbox folder reader 1.3002 metacpan
Mail::Mbox::MessageParser::Config An internal configuration class 0.0102 metacpan
Mail::Mbox::MessageParser::Grep A GNU grep-based mbox folder reader 1.7005 metacpan
Mail::Mbox::MessageParser::MetaInfo A cache for folder metadata 0.0200 metacpan
Mail::Mbox::MessageParser::Perl A Perl-based mbox folder reader 1.6005 metacpan

Other Files

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