exim paniclog on HOGEHOGE has non-zero size

exim paniclog on HOGEHOGE has non-zero size
というメールが溜まっていたのでログを確認する

# cat /var/log/exim4/paniclog
2013-12-08 11:35:33 IPv6 socket creation failed: Address family not supported by protocol

ipv6なんか知らねーよ