On Tue, 26 Mar 2019 14:44:32 -0700, Eric Abrahamsen wrote:
> Thanks for this report. When you have a moment will you please try the
> attached patch and see if it fixes the problem?

Works great.  Now I can enter and read the nnml:テスト group.
Thank you.  But there seem to be some more fix needed.

The group level of nnml:テスト is 1 and there are some unread
articles in it, however the group is not listed in the Group
buffer when I launch Gnus by `C-u 1 M-x gnus RET' (it also
happened when I worked on non-ASCII group names years ago, but
I don't recall how I fixed it, sorry).  Typing L helps it.

I tried changing `assoc' with `assoc-string' in nnrss.el, too.
It works for non-ASCII group names so far, though only I glanced
a few feeds.  A diff is attached.

Regards,