bug#51887: 28.0.60; Gnus use imap.163.com will hang emacs and ran out of memory

[Feng Shu]

I use gnus to connect imap.163.com server.

  (setq gnus-secondary-select-methods
        '((nnimap "imap.163.com"
                  (nnimap-inbox "INBOX")
                  (nnimap-split-methods default)
                  (nnimap-expunge t)
                  (nnimap-stream ssl)
                  (nnimap-fetch-partial-articles t))))

It connect success and have the below group:

   *      0: nnimap+imap.163.com:INBOX


But If no new mail, emacs will hang until run out memory when I into this group,
If have new mail, works.


process buffer is like below:

  * 10 EXISTS
  * 0 RECENT
  * OK [UIDVALIDITY 8358120] UIDs valid
  * FLAGS (\Answered \Seen \Deleted \Draft \Flagged)
  * OK [PERMANENTFLAGS (\Answered \Seen \Deleted \Draft \Flagged)] Limited
  169 OK [READ-WRITE] SELECT completed


*imap log*

  17:12:57 [imap.163.com] (inhibited)
  17:12:57 [imap.163.com] 208 CAPABILITY
  17:12:57 [imap.163.com] 209 LIST "" "*" 
  17:12:58 [imap.163.com] 217 LIST "" "*"
  17:12:58 [imap.163.com] 218 SELECT "INBOX"
  17:12:58 [imap.163.com] 219 UID FETCH 1:* FLAGS
  17:12:58 [imap.163.com] 220 EXAMINE "mail.misc"
  17:12:58 [imap.163.com] 221 UID FETCH 1320004027:* FLAGS
  17:12:58 [imap.163.com] 222 EXAMINE "INBOX"
  17:12:58 [imap.163.com] 223 UID FETCH 1320753282:* FLAGS
  17:13:02 [imap.163.com] 224 SELECT "mail.misc"



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:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES
NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF
TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM XWIDGETS GTK3 ZLIB

Important settings:
  value of $LANG: zh_CN.UTF-8
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  global-undo-tree-mode: t
  projectile-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  emms-playing-time-display-mode: t
  emms-playing-time-mode: t
  yas-global-mode: t
  company-posframe-mode: t
  global-company-mode: t
  org-super-agenda-mode: t
  shell-dirtrack-mode: t
  pyim-isearch-mode: t
  vertico-mode: t
  savehist-mode: t
  global-tab-line-mode: t
  global-so-long-mode: t
  electric-pair-mode: t
  recentf-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  context-menu-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
/home/feng/projects/emacs-packages/pyim/pyim-cregexp hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-cregexp
/home/feng/projects/emacs-packages/pyim/pyim-liberime hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-liberime
/home/feng/projects/emacs-packages/pyim/pyim-candidates hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-candidates
/home/feng/projects/emacs-packages/pyim/pyim-pinyin hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-pinyin
/home/feng/projects/emacs-packages/pyim/pyim-punctuation hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-punctuation
/home/feng/projects/emacs-packages/pyim/pyim-imobjs hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-imobjs
/home/feng/projects/emacs-packages/pyim/pyim-dcache hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-dcache
/home/feng/projects/emacs-packages/pyim/pyim-autoselector hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-autoselector
/home/feng/projects/emacs-packages/pyim/pyim-scheme hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-scheme
/home/feng/projects/emacs-packages/pyim/pyim-codes hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-codes
/home/feng/projects/emacs-packages/pyim/pyim-probe hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-probe
/home/feng/projects/emacs-packages/pyim/pyim-magic hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-magic
/home/feng/projects/emacs-packages/pyim/pyim-dict hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-dict
/home/feng/projects/emacs-packages/pyim/pyim-hacks hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-hacks
/home/feng/projects/emacs-packages/pyim/pyim-pymap hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-pymap
/home/feng/projects/emacs-packages/pyim/pyim-indicator hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-indicator
/home/feng/projects/emacs-packages/pyim/pyim-page hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-page
/home/feng/projects/emacs-packages/pyim/pyim-dhashcache hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-dhashcache
/home/feng/projects/emacs-packages/pyim/pyim-preview hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-preview
/home/feng/projects/emacs-packages/pyim/pyim hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim
/home/feng/projects/emacs-packages/pyim/pyim-entered hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-entered
/home/feng/projects/emacs-packages/pyim/pyim-cstring hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-cstring
/home/feng/projects/emacs-packages/pyim/pyim-outcome hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-outcome
/home/feng/projects/emacs-packages/pyim/pyim-common hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-common
/home/feng/projects/emacs-packages/pyim/pyim-process hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-process
/home/feng/projects/emacs-packages/pyim/pyim-dregcache hides 
/home/feng/.emacs.d/elpa-28/pyim-20211116.22/pyim-dregcache
/home/feng/.emacs.d/elpa-28/transient-20211105.100/transient hides 
/home/feng/emacs/emacs28-gtk-20211116/share/emacs/28.0.60/lisp/transient

Features:
(shadow mail-extr emacsbug sendmail misearch multi-isearch jka-compr
gnus-async pyim-dhashcache async mule-util gnus-ml hl-line nndraft nnmh
utf-7 gnutls network-stream nsm nnml cursor-sensor eh-gnus-common
gnus-select-account eww xdg url-queue mm-url gnus-demon gnus-agent
gnus-srvr gnus-score score-mode nnvirtual gnus-msg nntp gnus-cite
gnus-art mm-uu mml2015 mm-view mml-smime smime dig gnus-cache gnus-sum
shr kinsoku svg dom gnus-group gnus-undo gnus-start gnus-dbus dbus
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo gnus-spec gnus-int
gnus-range gnus-win gnus nnheader wjw eh-gnus emacs-helper eh-misc
undo-tree xwidget image-mode exif projectile lisp-mnt grep ibuf-ext
ibuffer ibuffer-loaddefs magit-bookmark magit-submodule magit-obsolete
magit-popup magit-blame magit-stash magit-reflog magit-bisect magit-push
magit-pull magit-fetch magit-clone magit-remote magit-commit
magit-sequence magit-notes magit-worktree magit-tag magit-merge
magit-branch magit-reset magit-files magit-refs magit-status magit
magit-repos magit-apply magit-wip magit-log which-func imenu magit-diff
smerge-mode diff diff-mode git-commit log-edit message rmc puny rfc822
mml mml-sec epa gnus-util rmail rmail-loaddefs mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums
mail-prsvr mailabbrev mail-utils gmm-utils mailheader pcvs-util add-log
magit-core magit-autorevert magit-margin magit-transient magit-process
with-editor server magit-mode transient magit-git magit-section
magit-utils crm gitpatch aggressive-indent eh-emms emms-librefm-stream
xml emms-librefm-scrobbler emms-playlist-limit emms-i18n emms-history
emms-score emms-stream-info emms-metaplaylist-mode emms-bookmarks
emms-cue emms-mode-line-icon emms-player-xine emms-player-mpd tq
emms-lyrics emms-url emms-streams emms-show-all emms-tag-editor
emms-tag-tracktag emms-mark emms-mode-line emms-info-tinytag
emms-info-metaflac emms-info-opusinfo emms-info-ogginfo
emms-info-mp3info emms-player-vlc emms-player-mpv emms-playing-time
emms-player-mplayer emms-player-simple emms-browser sort
emms-playlist-sort emms-last-played emms-volume emms-volume-sndioctl
emms-volume-mixerctl emms-volume-pulse emms-volume-amixer
emms-playlist-mode emms-source-playlist emms-source-file locate
emms-cache emms-info-native bindat emms-info-exiftool emms-info
emms-later-do emms-setup emms emms-compat epg rfc6068 epg-config el2org
cnfonts cnfonts-ui cus-edit cus-load thingatpt yasnippet vterm
face-remap compile color term disp-table ehelp vterm-module term/xterm
xterm eh-complete company-posframe company-keywords company-etags etags
fileloop xref project company-gtags company-template
company-dabbrev-code company-dabbrev company-files company-capf company
eh-org org-super-agenda ts ht s org-habit ob-python python tramp-sh
tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat
shell parse-time ls-lisp ob-org ob-plantuml ox-extra ox-md ox-org ox-odt
rng-loc rng-uri rng-parse rng-match rng-dt rng-util rng-pttrn nxml-parse
nxml-ns nxml-enc xmltok nxml-util ox-latex ox-icalendar org-agenda
ox-html table ox-ascii ox-publish ox org-element avl-tree generator
org-protocol autorevert filenotify org-attach org-id org-refile org ob
ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-footnote org-src
ob-comint org-pcomplete pcomplete comint ansi-color org-list org-faces
org-entities noutline outline org-version ob-emacs-lisp ob-core ob-eval
org-table oc-basic bibtex iso8601 time-date org-keys oc org-loaddefs
find-func eh-functions eh-theme modus-vivendi-theme modus-operandi-theme
modus-themes eh-basic cal-china-x cal-china lunar solar cal-dst holidays
hol-loaddefs cal-menu calendar cal-loaddefs pyim-liberime liberime
liberime-core pyim pyim-hacks pyim-probe pyim-cregexp easy-mmode pcase
xr pyim-process pyim-cstring pyim-autoselector pyim-punctuation
pyim-outcome pyim-indicator pyim-preview pyim-magic pyim-candidates
pyim-codes pyim-imobjs pyim-pinyin pyim-pymap pyim-dcache pyim-dict
derived pyim-page pyim-entered popup posframe pyim-scheme pyim-common
dired-ranger ring dired-hacks-utils dash wdired dired dired-loaddefs vc
vc-dispatcher consult-vertico consult orderless vertico savehist
tab-line switch-window switch-window-mvborder switch-window-asciiart
quail so-long elec-pair bookmark text-property-search pp recentf
tree-widget wid-edit elpa-mirror finder-inf ol org-compat advice
org-macs format-spec edmacro kmacro comp comp-cstr warnings rx cl-extra
help-mode info package browse-url url url-proxy url-privacy url-expand
url-methods url-history url-cookie url-domsuf url-util mailcap
url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json subr-x map url-vars seq byte-opt gv
bytecomp byte-compile cconv cl-loaddefs cl-lib china-util iso-transl
tooltip eldoc paren electric uniquify ediff-hook vc-hooks
lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads
xwidget-internal dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit
x multi-tty make-network-process native-compile emacs)

Memory information:
((conses 16 914774 81591)
 (symbols 48 51877 119)
 (strings 32 275864 8282)
 (string-bytes 1 7292453)
 (vectors 16 89807)
 (vector-slots 8 13555358 110222)
 (floats 8 1197 421)
 (intervals 56 1964 1082)
 (buffers 992 27))

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