bug#64117: 28.2; "gnus-request-set-mark: Buffer is read-only" when exiting agentized, unplugged summary buffer

[Jens Schmidt]

Hi Andrew,

you already have helped me out with a Gnus problem - probably could you
have a look at this one as well?  Looks simple enough, only I wonder why
nobody has complained earlier ...

BTW, is there a more appropriate ML to report Gnus issues than the
generic Emacs one?  And how about development questions related to Gnus?
info-gnus-english looks so abandoned ... I hope Gnus isn't.

Thanks!

Jens