Can't select group created by copying

[Jon K Hellan <Jon.K.Hellan@item.ntnu.no>]

Here's a problem I found. I am not sure how to deal with it.

When I create a new group by copying a message into it, I can't
enter that group until gnus has been restarted.

This happens with the nnimap backend, but from my meagre understanding
of the code, it doesn't look like a backend issue.

I use B c - gnus-summary-copy-article, and enter the name of a group
that does not exist. When prompted, I confirm that I want to create
it.

gnus-read-move-group-name creates the group, and activates it. Of
course, it is empty, and this is what (gnus-active <group-name>) will
report from now on.

When I subscribe the group in the Group buffer, and try to select it, the
active info is never updated. So gnus believes that it is still empty,
and refuses to enter it. "Can't select group".

So - when should the active info have been updated?

Jon