keychain 2.9.5: Ignoring SSH_AUTH_SOCK -- this is a forwarded socket

[danielrobbins]

In testing keychain, we sometimes get incorrect forwarded socket debug messages:

 * keychain ##VERSION## ~ https://www.funtoo.org/Funtoo:Keychain
 * Warning: Keychain dir has lax permissions. Use chmod -R go-rwx '/home/drobbins/.keychain' to fix.
 debug> SSH_AGENT_PID in quick is invalid; ignoring it
 debug> Ignoring SSH_AUTH_SOCK -- this is a forwarded socket
 debug> SSH_AGENT_PID in quick is invalid; ignoring it
 debug> Ignoring SSH_AUTH_SOCK -- this is a forwarded socket
 * Note: Quick start unsuccessful -- no agent found...
 debug> SSH_AGENT_PID in pidfile is invalid; ignoring it
 debug> Ignoring SSH_AUTH_SOCK -- this is a forwarded socket
 * Starting ssh-agent...
 * Adding 2 ssh key(s): /home/drobbins/.ssh/id_ed25519 /home/drobbins/.ssh/id_rsa
Enter passphrase for /home/drobbins/.ssh/id_rsa:
 * ssh-add: Identities added: /home/drobbins/.ssh/id_ed25519
/home/drobbins/.ssh/id_rsa

Calling command:
eval $( ~/development/keychain/keychain.sh --extended --quick --eval sshk:id_rsa sshk:id_ed25519 --debug)

Just because a socket is invalid doesn't mean it is forwarded.

Note that I had a line in my ~/.bash_profile which I unfortunately commented out:

#echo previous SSH_AUTH_SOCK was $SSH_AUTH_SOCK

This would make a good debug statement, because afterwards we can then investigate the path and see if it exists and where it came from.

A bit more troubleshooting/reproduction is needed here.