subiquity logs an error after disabling ssh

[Lorenz]

When ssh is disabled on an Ubuntu Core 18 device (amd64 or armhf), the following error message is printed to the screen / serial console:

Traceback (most recent call last):
File “/usr/share/subiquity/console-conf-write-login-details”, line 25, in
sys.exit(write_login_details_standalone())
File “/usr/share/subiquity/console_conf/controllers/identity.py”, line 184, in write_login_details_standalone
write_login_details(sys.stdout, owner[‘username’], ips)
File “/usr/share/subiquity/console_conf/controllers/identity.py”, line 153, in write_login_details
sshcommands=sshcommands, host_key_info=host_key_info(), tty_name=tty_name, first_ip=first_ip, version=version))
File “/usr/share/subiquity/console_conf/controllers/identity.py”, line 119, in host_key_info
longest_type = max([len(keytype) for keytype, _ in fingerprints])
ValueError: max() arg is an empty sequence

ssh is disabled as described here: https://docs.ubuntu.com/core/en/reference/core-configuration
snap set core service.ssh.disable=true

I did not notice any implications for my devices, which could result from this error. But I'm not sure whether this message can be ignored or if it is a symptom of a more severe error.

reference: https://forum.snapcraft.io/t/ubuntu-core-18-error-message-after-disabling-ssh/15824