Errors

use_warnings

Env::C

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 12 Aug 2017 03:27:37 AM JST
gpg:                using RSA key 440CEF2EB954CD8E
gpg: Can't check signature: No public key