[9fans] p9p mailfs returns warnings

[rudolf.sykora@gmail.com]

Hello everyone,

I have been using the acme Mail client in p9p for some time. It works
rather well for my needs. I use it with an imap access to my gmail
account. However, when I run the command

mailfs -t imap.gmail.com

which is issued before running acme itself and, afaik, provides the
real access to the gmail account, I usually (maybe always, I don't
know) get the following warnings:

% mailfs -t imap.gmail.com
warning: bad structure: (<nil> <nil> (<nil> <nil>) <nil> <nil> <nil> 11058)
warning: bad structure: (<nil> <nil> (<nil> <nil>) <nil> <nil> <nil> 4416)
warning: bad structure: (<nil> <nil> (<nil> <nil>) <nil> <nil> <nil> 4792)
warning: bad structure: (<nil> <nil> (<nil> <nil>) <nil> <nil> <nil> 5399)
warning: bad structure: (<nil> <nil> (<nil> <nil>) <nil> <nil> <nil> 5988)
warning: bad structure: (<nil> <nil> (<nil> <nil>) <nil> <nil> <nil> 5374)
...

Has anybody observed the same? What does it mean?
I think I haven't observed any complications which could possibly be
related to the warnings, still I am interested what these are about.

Thank you!
Ruda