Errors

meta_yml_conforms_to_known_spec

Expected a list structure (author) [Validation: 1.3]

use_warnings

Math::BigInt::FastCalc

valid_signature

Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Sat 30 Jun 2007 11:10:24 PM JST
gpg:                using RSA key 770B3C4393B84C15
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==