gpg: symbol lookup error: /usr/local/lib/libreadline.so.5: undefined symbol: PC

[DataD]

When using adept_manager to upgrade from 7.10 to 8.04, I get the 'gpg: symbol lookup error: /usr/local/lib/libreadline.so.5: undefined symbol: PC' error, and the upgrade terminates.

==

root# adept_manager &
kapture::PkgSystem::PkgSystem()
debconf
adduser
sysklogd
snort-mysql
oinkmaster
debconf
adduser
sysklogd
snort-mysql
oinkmaster
kdecore (KProcess): WARNING: _attachPty() 34
UpgradeWizard::checkForDistUpgrade
debconf
adduser
sysklogd
snort-mysql
oinkmaster
debconf
adduser
sysklogd
snort-mysql
oinkmaster
gpg: symbol lookup error: /usr/local/lib/libreadline.so.5: undefined symbol: PC

==

This is preventing me from upgrading.

Sigh.

[Ramsey (ramsey-williams)]

I get the same error upgrading from 8.10 to 9.04.

~$ sudo do-release-upgrade
Checking for a new ubuntu release
Done Upgrade tool signature
Done Upgrade tool
Done downloading
extracting 'jaunty.tar.gz'
authenticate 'jaunty.tar.gz' against 'jaunty.tar.gz.gpg'
exception from gpg: GnuPG exited non-zero, with code 8323072
Debug information:

gpg: symbol lookup error: /usr/local/lib/libreadline.so.5: undefined symbol: PC

Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server.