Errors

use_warnings

Bundle::ExCore, Bundle::ExCore::Perl5012, Bundle::ExCore::Perl5018, Bundle::ExCore::Perl5020

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 23 Apr 2015 06:43:15 PM JST
gpg:                using RSA key 61F76D9B913F270D
gpg: Can't check signature: No public key