Errors

use_warnings

Filter::gunzip, Filter::gunzip::Filter

valid_signature

Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Thu 21 Aug 2014 08:51:00 PM JST
gpg:                using DSA key 2C5302215F6ADD3A
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==