Dual-signing relies on the fact that at least one of the signatures is valid. One shouldn't block on /all/ signatures being valid. Thus imho this is a bug in the importer if it requires all keys.
Irrespective of the old bug 1752656, there is already 2018 key as an SRU to bionic in bug https://bugs.launchpad.net/ubuntu/bionic/+source/ubuntu-keyring/+bug/1798073 which is in the unapproved queue for a while now.
Dual-signing relies on the fact that at least one of the signatures is valid.
One shouldn't block on /all/ signatures being valid.
Thus imho this is a bug in the importer if it requires all keys.
Irrespective of the old bug 1752656, there is already 2018 key as an SRU to bionic in bug https:/ /bugs.launchpad .net/ubuntu/ bionic/ +source/ ubuntu- keyring/ +bug/1798073 which is in the unapproved queue for a while now.