bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Feng Shu]

Gnus will hang emacs when run gnus-summary-delete-article and nnimap expunge return NO.

   651 NO System busy!
     NO System busy!

   Process *nnimap* deleted



In GNU Emacs 28.0.60 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, cairo version 1.16.0)
 of 2021-11-16 built on debian
Repository revision: e852822f3db469c985bf022651f184d6ff2c518a
Repository branch: emacs-28
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Debian GNU/Linux 11 (bullseye)

Configured using:
 'configure --prefix=/home/feng/emacs/emacs28-gtk-20211116
 --with-native-compilation --with-xwidgets --with-json'

Configured features:
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JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES
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-- 

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Lars Ingebrigtsen]

"Feng Shu" <tumashu@163.com> writes:

> Gnus will hang emacs when run gnus-summary-delete-article and nnimap expunge return NO.
>
>    651 NO System busy!
>      NO System busy!
>
>    Process *nnimap* deleted

Can you (setq debug-on-quit t) and `C-g' when it hangs?  Post the
resulting backtrace.

The code is supposed to exit if the server closes the connections, but
it sounds like there's a bug there, but it's not clear where.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Feng Shu]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "Feng Shu" <tumashu@163.com> writes:
>
>> Gnus will hang emacs when run gnus-summary-delete-article and nnimap expunge return NO.
>>
>>    651 NO System busy!
>>      NO System busy!
>>
>>    Process *nnimap* deleted
>
> Can you (setq debug-on-quit t) and `C-g' when it hangs?  Post the
> resulting backtrace.

Debugger entered: ("Quit")
  nnimap-wait-for-response(296)
  nnimap-get-response(296)
  nnimap-command("UID EXPUNGE %s" "842,845")
  nnimap-delete-article((842 845))
  nnimap-request-expire-articles((842 845) "INBOX" "imap.qq.com" force)
  gnus-request-expire-articles((842 845) "nnimap+imap.qq.com:INBOX" force)
  gnus-summary-delete-article(nil)
  funcall-interactively(gnus-summary-delete-article nil)
  call-interactively(gnus-summary-delete-article nil nil)
  command-execute(gnus-summary-delete-article)


my config:

        (nnimap "imap.qq.com"
                (nnimap-record-commands t)
                (nnimap-expunge t)
                (nnimap-stream ssl)
                (nnimap-fetch-partial-articles t))


18:50:01 [imap.qq.com] 296 UID EXPUNGE 842,845


329 NO System busy!
 NO System busy!






>
> The code is supposed to exit if the server closes the connections, but
> it sounds like there's a bug there, but it's not clear where.

-- 

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Lars Ingebrigtsen]

"Feng Shu" <tumashu@163.com> writes:

>>>    651 NO System busy!
>>>      NO System busy!
>>>
>>>    Process *nnimap* deleted
>>
>> Can you (setq debug-on-quit t) and `C-g' when it hangs?  Post the
>> resulting backtrace.
>
> Debugger entered: ("Quit")
>   nnimap-wait-for-response(296)
>   nnimap-get-response(296)
>   nnimap-command("UID EXPUNGE %s" "842,845")

>>>    651 NO System busy!
>>>      NO System busy!

Hm...  I think the problem here is that the output from the IMAP server
is buggy.  nnimap is waiting for this line:

651 NO System busy!

but the server has appended

  NO System busy!

to the end of the buffer, so it's not finding that line.  What IMAP
server softward is this with?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Feng Shu]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "Feng Shu" <tumashu@163.com> writes:
>
>>>>    651 NO System busy!
>>>>      NO System busy!
>>>>
>>>>    Process *nnimap* deleted
>>>
>>> Can you (setq debug-on-quit t) and `C-g' when it hangs?  Post the
>>> resulting backtrace.
>>
>> Debugger entered: ("Quit")
>>   nnimap-wait-for-response(296)
>>   nnimap-get-response(296)
>>   nnimap-command("UID EXPUNGE %s" "842,845")
>
>>>>    651 NO System busy!
>>>>      NO System busy!
>
> Hm...  I think the problem here is that the output from the IMAP server
> is buggy.  nnimap is waiting for this line:
>
> 651 NO System busy!
>
> but the server has appended
>
>   NO System busy!
>
> to the end of the buffer, so it's not finding that line.  What IMAP
> server softward is this with?

I do not know, it is imap server of https://mail.qq.com/

-- 

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Lars Ingebrigtsen]

"Feng Shu" <tumashu@163.com> writes:

> I do not know, it is imap server of https://mail.qq.com/

(nnimap-greeting nnimap-object)

should tell you the name.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Feng Shu]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "Feng Shu" <tumashu@163.com> writes:
>
>> I do not know, it is imap server of https://mail.qq.com/
>
> (nnimap-greeting nnimap-object)
>
> should tell you the name.

* OK [CAPABILITY IMAP4 IMAP4rev1 ID AUTH=PLAIN AUTH=LOGIN AUTH=XOAUTH2 NAMESPACE] QQMail XMIMAP4Server ready

-- 

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Lars Ingebrigtsen]

"Feng Shu" <tumashu@163.com> writes:

> * OK [CAPABILITY IMAP4 IMAP4rev1 ID AUTH=PLAIN AUTH=LOGIN AUTH=XOAUTH2
> NAMESPACE] QQMail XMIMAP4Server ready

I guess it's a server they've written themselves -- "QQMail"?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Feng Shu]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> "Feng Shu" <tumashu@163.com> writes:
>
>> * OK [CAPABILITY IMAP4 IMAP4rev1 ID AUTH=PLAIN AUTH=LOGIN AUTH=XOAUTH2
>> NAMESPACE] QQMail XMIMAP4Server ready
>
> I guess it's a server they've written themselves -- "QQMail"?

Maybe

-- 

bug#51934: 28.0.60; gnus-summary-delete-article will hang emacs if nnimap expunge to NO

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

>>>>    651 NO System busy!
>>>>      NO System busy!
>
> Hm...  I think the problem here is that the output from the IMAP server
> is buggy.  nnimap is waiting for this line:
>
> 651 NO System busy!
>
> but the server has appended
>
>   NO System busy!
>
> to the end of the buffer, so it's not finding that line.  What IMAP
> server softward is this with?

The conclusion here is that the IMAP server they've written is buggy.
In the IMAP protocol, there's no way to parse that output reliably
(without adding a quirk that looks for " NO System busy"), so I'm
closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no