Errors

meta_json_conforms_to_known_spec

License 'perl' is invalid (license -> perl) [Validation: 2]

use_warnings

PerlX::Maybe, Syntax::Feature::Maybe

valid_signature

Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Tue 27 Aug 2013 03:56:36 PM JST
gpg:                using DSA key CEBF81286A2A7D39
gpg: Can't check signature: No public key