Knut Anders Hatlen <kahatlen@gmail.com> writes:

> Lars Magne Ingebrigtsen <larsi@gnus.org> writes:
>
>> Knut Anders Hatlen <kahatlen@gmail.com> writes:
>>
>>> *nnimap <server> *nntpd** says this after M-g:
>>
>> [...]
>>
>>> * OK [PERMANENTFLAGS (%Seen %Deleted %Answered %Forwarded %Redirected %Flagged %Hidden %Draft $MDNSent)] Permanent flags^M
>>
>> [...]
>>
>>> * 202 FETCH (FLAGS (%Flagged) UID 1215)^M
>>
>> Looks OK.  What does `G E' on the group after this look like?
>
> ("mail.autoderby" 3
>  ((1 . 1222))
>  ((seen (1223 . 1224)))
>  nil
>  ((modseq)
>   (uidvalidity . "6567453")
>   (active 1012 . 1224)
>   (permanent-flags %Seen %Deleted %Answered %Forwarded %Redirected %Flagged %Hidden %Draft $MDNSent)))

Found it. The server doesn't have \* in PERMANENTFLAGS. And the
non-QRESYNC code in nnimap-update-info fails to see that \Flagged is
supported because it checks whether (%Flagged 1012 1027 ...)  is member
of permanent-flags. So it seems it's just missing a call to car before
calling memq. The attached patch made the problem go away for me.

-- 
Knut Anders