Subject: bug#44509: 28.0.50; Error querying with new gnus-search and notmuch

From: "Jose A. Ortega Ruiz" <[email-masked]>
Date: Sun, 08 Nov 2020 01:44:57 +0000

Hi,

I've been trying the recently added gnus-search with an nnimap local
server (dovecot) that i index with notmuch.  More concretely:

   - dovecot is saving my incoming email in maildirs located at
     ~/var/mail.
   - notmuch is indexing ~/var/mail.  that's working well: i can use
     notmuch without problems.
   - gnus has a secondary method for accessing dovecot using nnimap, but
     i would like searches on its groups to be performed using notmuch,
     not the built-in imap search.  so i add a secondary method that
     looks like this:

       (nnimap ""
              (nnimap-address "localhost")
              (nnimap-expunge immediately)
              (gnus-search-engine gnus-search-notmuch
                 (remove-prefix "/home/jao/var/mail/")))

   - if i now query any of my nnimap groups with a query that gives me
     back one or more results, i get an error with a backtrace that
     looks like this one ("nnimap:feeds.emacs" is the group name in this
     concrete case):

  --8<---------------cut here---------------start------------->8---
  gnus-compress-sequence((nil))
  nnselect-compress-artlist([["nnimap:feeds.emacs" nil 100]])
  nnselect-request-group("nnselect-87lffe8d08.fsf" "nnselect-ephemeral" t ("nnselect:nnselect-87lffe8d08.fsf" 3 nil nil (nnselect "nnselect-ephemeral" (nnselect-address "nnselect")) ((quit-config #<buffer *Group*> . group) (nnselect-specs (nnselect-function . gnus-search-run-query) (nnselect-args (search-query-spec (query . "Maxim") (raw)) (search-group-spec ("nnimap:" "nnimap:feeds/emacs")))) (nnselect-artlist))))
  gnus-request-group("nnselect:nnselect-87lffe8d08.fsf" t nil ("nnselect:nnselect-87lffe8d08.fsf" 3 nil nil (nnselect "nnselect-ephemeral" (nnselect-address "nnselect")) ((quit-config #<buffer *Group*> . group) (nnselect-specs (nnselect-function . gnus-search-run-query) (nnselect-args (search-query-spec (query . "Maxim") (raw)) (search-group-spec ("nnimap:" "nnimap:feeds/emacs")))) (nnselect-artlist))))
  gnus-select-newsgroup("nnselect:nnselect-87lffe8d08.fsf" t nil)
  gnus-summary-read-group-1("nnselect:nnselect-87lffe8d08.fsf" t t nil nil nil)
  gnus-summary-read-group("nnselect:nnselect-87lffe8d08.fsf" t t nil nil nil nil)
  gnus-group-read-group(t t "nnselect:nnselect-87lffe8d08.fsf" nil)
  gnus-group-read-ephemeral-group("nnselect-87lffe8d08.fsf" (nnselect "nnselect") nil (#<buffer *Group*> . group) nil nil ((nnselect-specs (nnselect-function . gnus-search-run-query) (nnselect-args (search-query-spec (query . "Maxim") (raw)) (search-group-spec ("nnimap:" "nnimap:feeds/emacs")))) (nnselect-artlist)))
  gnus-group-read-ephemeral-search-group(nil)
  funcall-interactively(gnus-group-read-ephemeral-search-group nil)
  call-interactively(gnus-group-read-ephemeral-search-group nil nil)
  command-execute(gnus-group-read-ephemeral-search-group)
  --8<---------------cut here---------------end--------------->8---

Maybe this trick of using notmuch on imap groups is not really supposed
to work? If i used the default gnus-search-imap engine, queries work
fine, but notmuch is so much faster that it'd be nice to use its engine
instead.

Thanks!

In GNU Emacs 28.0.50 (build 19, x86_64-pc-linux-gnu, cairo version 1.16.0)
 of 2020-11-06 built on osgiliath
Repository revision: 093a6bec52d21aba6b3b1318a6d7bafc2c870f25
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Debian GNU/Linux bullseye/sid

Configured using:
 'configure --prefix=/usr/local/stow/emacs --with-x-toolkit=no
 --with-imagemagick'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO IMAGEMAGICK SOUND DBUS GSETTINGS GLIB
NOTIFY INOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT
LIBOTF ZLIB OLDXMENU X11 XDBE XIM MODULES THREADS JSON PDUMPER LCMS2

Important settings:
  value of $LANG: en_GB.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  semantic-minor-modes-format: ((:eval (if (or semantic-highlight-edits-mode semantic-show-unmatched-syntax-mode)  S)))
  gnus-agent-group-mode: t
  circe-lagmon-mode: t
  gnus-topic-mode: t
  telega-mode-line-mode: t
  ednc-mode: t
  global-diff-hl-mode: t
  eshell-syntax-highlighting-global-mode: t
  pdf-occur-global-minor-mode: t
  gnus-undo-mode: t
  winner-mode: t
  modern-fringes-mode: t
  show-paren-mode: t
  persistent-scratch-autosave-mode: t
  global-so-long-mode: t
  display-battery-mode: t
  global-company-mode: t
  ivy-rich-mode: t
  counsel-mode: t
  ivy-mode: t
  savehist-mode: t
  recentf-mode: t
  save-place-mode: t
  global-magit-file-mode: t
  magit-auto-revert-mode: t
  global-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  shell-dirtrack-mode: t
  override-global-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t

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/home/jao/.emacs.d/elpa.28/org-20201102/org-install hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-install
/home/jao/.emacs.d/elpa.28/org-20201102/org-macs hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-macs
/home/jao/.emacs.d/elpa.28/org-20201102/org-mouse hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-mouse
/home/jao/.emacs.d/elpa.28/org-20201102/org-habit hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-habit
/home/jao/.emacs.d/elpa.28/org-20201102/ox-man hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ox-man
/home/jao/.emacs.d/elpa.28/org-20201102/ol-w3m hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ol-w3m
/home/jao/.emacs.d/elpa.28/org-20201102/ob-octave hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-octave
/home/jao/.emacs.d/elpa.28/org-20201102/org-footnote hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-footnote
/home/jao/.emacs.d/elpa.28/org-20201102/ol-irc hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ol-irc
/home/jao/.emacs.d/elpa.28/org-20201102/ob-calc hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-calc
/home/jao/.emacs.d/elpa.28/org-20201102/ob-comint hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-comint
/home/jao/.emacs.d/elpa.28/org-20201102/ob-groovy hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-groovy
/home/jao/.emacs.d/elpa.28/org-20201102/org-compat hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-compat
/home/jao/.emacs.d/elpa.28/org-20201102/ob-lua hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-lua
/home/jao/.emacs.d/elpa.28/org-20201102/org-mobile hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-mobile
/home/jao/.emacs.d/elpa.28/org-20201102/ob-eshell hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-eshell
/home/jao/.emacs.d/elpa.28/org-20201102/org-macro hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-macro
/home/jao/.emacs.d/elpa.28/org-20201102/org-plot hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-plot
/home/jao/.emacs.d/elpa.28/org-20201102/org-goto hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-goto
/home/jao/.emacs.d/elpa.28/org-20201102/ob-vala hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-vala
/home/jao/.emacs.d/elpa.28/org-20201102/ob-emacs-lisp hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-emacs-lisp
/home/jao/.emacs.d/elpa.28/org-20201102/ob-shell hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-shell
/home/jao/.emacs.d/elpa.28/org-20201102/org-version hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-version
/home/jao/.emacs.d/elpa.28/org-20201102/org-loaddefs hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/org-loaddefs
/home/jao/.emacs.d/elpa.28/org-20201102/ob-io hides /usr/local/stow/emacs/share/emacs/28.0.50/lisp/org/ob-io

Features:
(shadow gnus-fun bbdb-pgp mailalias bbdb-message flow-fill ffap
magit-extras url-cache lui-track circe-display-images circe-color-nicks
circe-lagmon circe lui-irc-colors irc lcs lui-format circe-compat
bash-completion em-unix em-script em-prompt em-ls em-hist em-pred
em-glob em-dirs esh-var em-cmpl em-basic em-banner em-alias gnus-cite qp
mm-archive mail-extr gnus-bcklg nnmaildir gnus-async gnus-dup gnus-ml
gnus-topic utf-7 bbdb-gnus gnus-delay gnus-draft gnus-agent gnus-srvr
gnus-score score-mode nnvirtual gnus-cache gnus-msg nndraft nnmh
gnus-demon nntp cal-move help-fns radix-tree cl-print debug backtrace
quail counsel-spotify counsel-spotify-messages
counsel-spotify-notifications counsel-spotify-backends
counsel-spotify-search ucs-normalize calc-bin calc-misc calc-menu
calc-aent w3m-cookie w3m-form w3m-symbol w3m-filter w3m-search
w3m-bookmark w3m-tabmenu w3m-session view cal-iso emojify apropos
tar-mode arc-mode archive-mode ht twittering-mode slack slack-company
slack-unread slack-websocket slack-thread-event slack-room-event
slack-star-event slack-reaction-event slack-reply-event slack-typing
slack-slash-commands slack-message-event slack-event
slack-dialog-edit-element-buffer slack-dialog-buffer slack-dialog
slack-stars-buffer slack-search-result-buffer
slack-thread-message-compose-buffer slack-file-list-buffer
slack-file-info-buffer slack-all-threads-buffer slack-message-buffer
slack-user-profile-buffer slack-pinned-items-buffer slack-pinned-item
slack-thread-message-buffer slack-room-info-buffer slack-room-buffer
slack-message-share-buffer slack-message-edit-buffer
slack-room-message-compose-buffer slack-message-compose-buffer
slack-message-attachment-preview-buffer slack-action slack-star
slack-reminder slack-search slack-message-reaction slack-message-editor
slack-message-sender slack-message-notification slack-buffer
slack-message-formatter slack-thread slack-im slack-channel slack-group
slack-conversations slack-create-message slack-attachment
slack-selectable slack-bot-message slack-user-message slack-file
slack-message slack-message-faces slack-unescape slack-block
slack-mrkdwn slack-usergroup slack-reaction slack-modeline slack-room
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slack-image slack-request slack-log request lui tracking shorten
flyspell ispell slack-team slack-team-ws slack-util websocket bindat
copyright sh-script executable sgml-mode paredit vc-mtn vc-hg vc-bzr
vc-src vc-sccs vc-svn vc-cvs vc-rcs mule-util ace-window avy jao-patches
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emms-info-exiftool emms-info-tinytag emms-info-metaflac
emms-info-opusinfo emms-info-ogginfo emms-info-mp3info emms-info
emms-later-do emms-playlist-mode emms-player-vlc emms-player-mpv
emms-player-mplayer emms-player-simple emms-source-playlist
emms-source-file locate emms-setup emms emms-compat spotify
telega-obsolete telega telega-tdlib-events telega-modes telega-webpage
telega-root telega-chat telega-company telega-user telega-notifications
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alchemist-project alchemist-file alchemist-key alchemist-utils
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virtualenvwrapper gud ediprolog sesman vc vc-dispatcher clojure-mode
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eshell-syntax-highlighting vterm face-remap vterm-module term ehelp
jao-doc-view saveplace-pdf-view pdf-occur ibuf-ext ibuffer
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semantic/wisent semantic/wisent/wisent semantic/util-modes semantic/util
semantic semantic/tag semantic/lex semantic/fw mode-local cedet
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pdf-cache pdf-info tq pdf-util bbdb-mua bbdb-anniv bbdb-com jao-frm
visual-fill-column counsel-notmuch notmuch hl-line notmuch-tree
notmuch-jump notmuch-hello notmuch-show notmuch-print notmuch-crypto
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notmuch-address notmuch-company notmuch-parser notmuch-wash coolj
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bug-reference forge-post forge-repo forge forge-core forge-db closql
emacsql-sqlite emacsql emacsql-compiler url-http url-auth url-gw nsm
cdlatex texmathp disp-table w3m w3m-hist w3m-fb bookmark-w3m w3m-ems
w3m-favicon w3m-image tab-line w3m-proc w3m-util bibtex bbdb bbdb-site
timezone smtpmail sendmail randomsig gnutls markdown-toc s markdown-mode
thingatpt org-static-blog htmlize jao-org-utils ol-info ol-docview
doc-view image-mode exif ol-bbdb ol-eshell esh-mode eshell esh-cmd
esh-ext esh-opt esh-proc esh-io esh-arg esh-module esh-groups esh-util
ol-w3m ol-gnus nnselect gnus-search eieio-opt speedbar ezimage dframe
gnus-icalendar org-capture gnus-art mm-uu mml2015 mm-view mml-smime
smime dig gnus-sum shr kinsoku svg dom gnus-group gnus-undo gnus-start
gnus-dbus gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo gnus-spec
gnus-int gnus-range gnus-win icalendar org-agenda org-refile gnus
nnheader epresent ob-shell ob-scheme ob-python python tramp-sh tramp
tramp-loaddefs trampver tramp-integration files-x tramp-compat
parse-time iso8601 ls-lisp ob-org ob-ocaml ob-makefile ob-haskell
ob-gnuplot ob-clojure ob-calc calc-store calc-trail calc-ext calc
calc-loaddefs calc-macs ob-prolog prolog smie align ob-elixir org-tempo
tempo 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 ox-html table ox-ascii ox-publish ox org-element avl-tree
org-fragtog winner bm modern-fringes jao-notify paren iscroll inform
find-dired dired-x jka-compr company-oddmuse company-keywords
company-etags etags fileloop generator company-gtags
company-dabbrev-code company-dabbrev company-files company-clang
company-capf company-cmake company-semantic company-template
company-bbdb persistent-scratch so-long epa-file battery cal-china lunar
solar cal-dst cal-bahai cal-islam cal-hebrew holidays hol-loaddefs
vc-git appt diary-lib diary-loaddefs company-quickhelp pos-tip
company-math math-symbol-lists company pcase alert log4e notifications
gntp ivy-rich wgrep-ag wgrep grep diminish counsel xdg xref project
compile swiper ivy flx delsel ivy-faces ivy-overlay colir autoinsert
time jao-greenish-theme jao-themes cl memory-usage jao-sleep dbus xml
undo-fu-session savehist recentf tree-widget saveplace
gnu-elpa-keyring-update poly-org orgit magit-submodule magit-obsolete
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 magit-core magit-autorevert autorevert filenotify
magit-margin magit-transient magit-process magit-mode git-commit
transient magit-git magit-section magit-utils crm log-edit message rmc
puny dired dired-loaddefs rfc822 mml mml-sec epa epg epg-config
gnus-util rmail rmail-loaddefs text-property-search 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
with-editor async-bytecomp async shell server dash 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 time-date noutline outline org-version ob-emacs-lisp
org-table ol org-keys org-loaddefs find-func cal-menu calendar
cal-loaddefs polymode derived poly-lock polymode-base polymode-weave
polymode-export polymode-compat polymode-methods polymode-core
polymode-classes eieio-custom eieio-base color paradox paradox-menu
paradox-commit-list hydra ring lv cus-edit pp cus-start cus-load
wid-edit paradox-execute paradox-github paradox-core spinner cl-extra
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org-macs format-spec finder-inf tex-site gh-common marshal eieio-compat
rx edmacro kmacro w3m-load info package easymenu browse-url url
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url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq
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url-vars seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
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 elisp-mode
lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
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 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 dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo x multi-tty make-network-process emacs)

Memory information:
((conses 16 3337525 350243)
 (symbols 48 95123 8)
 (strings 32 552087 43578)
 (string-bytes 1 18251913)
 (vectors 16 280839)
 (vector-slots 8 8179302 322493)
 (floats 8 3268 3751)
 (intervals 56 120431 16846)
 (buffers 992 183))

--
No amount of belief makes something a fact. -James Randi

--
A man has to live with himself, and he should see to it that he always has
good company. -Charles Evans Hughes, jurist (1862-1948)

-- 
Experience is not what happens to you; it is what you do with what
happens to you.
 - Aldous Huxley