bug#43538: 27.1; Hiding the thread moved us backwards, aborting!

bug#43538: 27.1; Hiding the thread moved us backwards, aborting!

[dick]

[-- Attachment #1: Type: text/plain, Size: 184 bytes --]


In a gnus summary buffer, hide all threads `T H`.  A search via `M-s` for an
arbitrary search term yields the ominous and enigmatic "Hiding the thread
moved us backwards, aborting!"


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-Avoid-a-2011-hack-that-begs-off-an-infinite-loop.patch --]
[-- Type: text/x-diff, Size: 1094 bytes --]

From ed4adcfaa588fd3d7609acef07af9a8ebbcd04b2 Mon Sep 17 00:00:00 2001
From: dickmao <none>
Date: Sun, 20 Sep 2020 14:17:53 -0400
Subject: [PATCH] Avoid a 2011 hack that begs off an infinite loop

`gnus-summary-position-point' moves point before the hidden
thread thus breaking an assumption that `gnus-summary-hide-thread'
would only ever move the point forward.
* lisp/gnus/gnus-sum.el (gnus-summary-hide-thread):
Jump past invisible thread instead of begging off with an out-of-band
diagnostic.
---
 lisp/gnus/gnus-sum.el | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lisp/gnus/gnus-sum.el b/lisp/gnus/gnus-sum.el
index 8e27a94e5b..c2af93dbed 100644
--- a/lisp/gnus/gnus-sum.el
+++ b/lisp/gnus/gnus-sum.el
@@ -11829,8 +11829,7 @@ gnus-summary-hide-thread
 		(overlay-put ol 'evaporate t)))
 	    (gnus-summary-goto-subject article)
             (when (> start (point))
-              (message "Hiding the thread moved us backwards, aborting!")
-              (goto-char (point-max))))
+              (goto-char starteol)))
 	(goto-char start)
 	nil))))
 
-- 
2.26.2


[-- Attachment #3: Type: text/plain, Size: 11576 bytes --]




In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2020-08-25 built on dick
Repository revision: ddd82c2b1261b2c5d5425c0738112f47e2bb18bf
Repository branch: gnus-dev-27
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Ubuntu 18.04.4 LTS

Recent messages:
Mark saved where search started [6 times]
Auto-saving...done
Quit [2 times]
Auto-saving...done
Mark set
Mark saved where search started [2 times]
Saving file /home/dick/emacs/.git/COMMIT_EDITMSG...
Wrote /home/dick/emacs/.git/COMMIT_EDITMSG
Git finished
Mark saved where search started

Configured using:
 'configure --prefix=/home/dick/.local --with-rsvg=yes --with-xml2=yes'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY LIBSELINUX
GNUTLS LIBXML2 FREETYPE HARFBUZZ XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE
XIM MODULES THREADS JSON PDUMPER GMP

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

Major mode: Outline

Minor modes in effect:
  semantic-minor-modes-format: ((:eval (if (or semantic-highlight-edits-mode semantic-show-unmatched-syntax-mode)  S)))
  pdf-occur-global-minor-mode: t
  bug-reference-mode: t
  pyvenv-mode: t
  show-paren-mode: t
  global-magit-file-mode: t
  magit-file-mode: t
  magit-auto-revert-mode: t
  auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  flx-ido-mode: t
  projectile-mode: t
  ido-everywhere: t
  override-global-mode: t
  shell-dirtrack-mode: t
  global-hl-line-mode: t
  winner-mode: t
  cl-old-struct-compat-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
/home/dick/ESS/lisp/obsolete/ess-swv hides /home/dick/ESS/lisp/ess-swv
/home/dick/ESS/lisp/obsolete/ess-rutils hides /home/dick/ESS/lisp/ess-rutils
/home/dick/ESS/lisp/obsolete/ess-noweb hides /home/dick/ESS/lisp/ess-noweb
/home/dick/ESS/lisp/obsolete/mouseme hides /home/dick/ESS/lisp/mouseme
/home/dick/ESS/lisp/obsolete/ess-mouse hides /home/dick/ESS/lisp/ess-mouse
/home/dick/ESS/lisp/obsolete/ess-noweb-mode hides /home/dick/ESS/lisp/ess-noweb-mode
/home/dick/ESS/lisp/obsolete/make-regexp hides /home/dick/ESS/lisp/make-regexp
/home/dick/ESS/lisp/obsolete/ess-r-a hides /home/dick/ESS/lisp/ess-r-a
/home/dick/ESS/lisp/obsolete/ess-noweb-font-lock-mode hides /home/dick/ESS/lisp/ess-noweb-font-lock-mode
/home/dick/gomacro-mode/gomacro-mode hides /home/dick/.emacs.d/elpa/gomacro-mode-20200326.1103/gomacro-mode
/home/dick/ESS/lisp/julia-mode-latexsubs hides /home/dick/.emacs.d/elpa/julia-mode-20200717.1915/julia-mode-latexsubs
/home/dick/ESS/lisp/julia-mode hides /home/dick/.emacs.d/elpa/julia-mode-20200717.1915/julia-mode
/home/dick/.emacs.d/elpa/hydra-20170924.2259/lv hides /home/dick/.emacs.d/elpa/lv-20191106.1238/lv
/home/dick/melpa-stats/melpa-stats hides /home/dick/.emacs.d/elpa/melpa-stats-20190720.1833/melpa-stats
/home/dick/.emacs.d/elpa/async-20200113.1745/async-autoloads hides /home/dick/.local/share/emacs/site-lisp/emacs-async/async-autoloads
/home/dick/.emacs.d/elpa/async-20200113.1745/async-bytecomp hides /home/dick/.local/share/emacs/site-lisp/emacs-async/async-bytecomp
/home/dick/.emacs.d/elpa/async-20200113.1745/smtpmail-async hides /home/dick/.local/share/emacs/site-lisp/emacs-async/smtpmail-async
/home/dick/.emacs.d/elpa/async-20200113.1745/dired-async hides /home/dick/.local/share/emacs/site-lisp/emacs-async/dired-async
/home/dick/.emacs.d/elpa/async-20200113.1745/async hides /home/dick/.local/share/emacs/site-lisp/emacs-async/async
/home/dick/.emacs.d/elpa/async-20200113.1745/async-pkg hides /home/dick/.local/share/emacs/site-lisp/emacs-async/async-pkg
/home/dick/.emacs.d/lisp/json hides /home/dick/.local/share/emacs/27.1/lisp/json
/home/dick/.emacs.d/elpa/map-2.1/map hides /home/dick/.local/share/emacs/27.1/lisp/emacs-lisp/map

Features:
(shadow sort flyspell ispell footnote mail-extr gnus-msg gnus-art mm-uu
mml2015 mm-view mml-smime smime dig emacsbug sendmail dired-aux rect
git-rebase sx-interaction sx-compose sx-question-list sx-favorites sx-networks
sx-site sx-tag sx-time sx-question-mode sx-question-print sx-user sx-babel
sx-button markdown-mode edit-indirect sx-switchto sx-question sx-method
sx-auth sx-filter sx-request sx-encoding sx-cache pdf-sync pdf-annot
pdf-outline pdf-history pdf-occur pdf-links pdf-tools pdf-isearch tablist
pdf-misc pdf-view magit-bookmark bookmark pdf-cache pdf-info tq pdf-util
tablist-filter semantic/wisent/comp semantic/wisent semantic/wisent/wisent
semantic/util-modes semantic/util semantic semantic/tag semantic/lex
semantic/fw mode-local cedet tar-mode arc-mode archive-mode make-mode tabify
linum term disp-table ehelp fzf autoload lisp-mnt mm-archive timezone
ein-markdown-mode ein-ipynb-mode ein-process ein-jupyter exec-path-from-shell
ein-dev ein-notebook ein-gat ein-python-send ein-traceback ein-shared-output
ein-pytools ein-pager view ein-completer ein-notification ein-scratchsheet
ein-worksheet poly-ein display-line-numbers polymode poly-lock polymode-base
polymode-weave polymode-export polymode-compat polymode-methods polymode-core
polymode-classes eieio-custom ein-kill-ring ein-kernelinfo ein-file
ein-notebooklist eieio-opt speedbar sb-image ezimage dframe ein-contents-api
bug-reference magit-extras mule-util face-remap vc vc-dispatcher cl-print
debug backtrace pulse ivy delsel colir color ivy-overlay dumb-jump f
company-oddmuse company-keywords company-etags company-gtags
company-dabbrev-code company-dabbrev company-files company-cmake company-xcode
company-eclim company-css company-nxml company-bbdb company-go
company-template company-c-headers es-mode js yasnippet-snippets yasnippet
company-capf help-fns radix-tree elpy elpy-rpc pyvenv eshell esh-cmd esh-ext
esh-opt esh-proc esh-io esh-arg esh-module esh-groups esh-util elpy-shell
elpy-profile elpy-django elpy-refactor python tramp-sh jsonnet-mode ag vc-svn
find-dired s sh-script executable org-element avl-tree ol-eww ol-rmail ol-mhe
ol-irc ol-info ol-gnus nnir gnus-sum gnus-group gnus-undo gnus-start
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo gnus-spec gnus-int
gnus-range gnus-win ol-docview doc-view image-mode exif ol-bibtex bibtex
ol-bbdb ol-w3m org-tempo tempo org org-macro org-footnote org-pcomplete
org-list org-faces org-entities org-version ob-jupyter jupyter-org-extensions
jupyter-org-client jupyter-repl jupyter-kernel-manager jupyter-channel
jupyter-widget-client simple-httpd jupyter-client jupyter-comm-layer
jupyter-messages hmac-def jupyter-mime shr svg dom jupyter-kernelspec
jupyter-env jupyter-base tramp tramp-loaddefs trampver tramp-integration
files-x tramp-compat parse-time iso8601 ls-lisp eieio-base ob-emacs-lisp
ob-ein ein-cell ein-output-area ein-kernel ein-ipdb ein-query ein-events
ein-websocket websocket bindat ein-node ewoc ein-log ein-classes ein-core
request ein ein-utils deferred cc-mode cc-fonts cc-guess cc-menus cc-cmds
cc-styles cc-align cc-engine cc-vars cc-defs ob ob-tangle org-src ob-ref
ob-lob ob-table ob-exp ob-comint ob-core ob-eval org-table ol org-keys
org-compat org-macs org-loaddefs cal-menu calendar cal-loaddefs conf-mode
network-stream url-http url-gw nsm url-cache url-auth misearch multi-isearch
flycheck find-func jka-compr let-alist go-eldoc gomacro-mode go-mode find-file
ffap paredit-ext paredit dired-x inf-ruby ruby-mode smie melpa-stats ht
dash-functional anaphora a pp sx key-combo company haskell-interactive-mode
haskell-presentation-mode haskell-process haskell-session haskell-compile
haskell-mode haskell-cabal haskell-utils haskell-font-lock haskell-indentation
haskell-string haskell-sort-imports haskell-lexeme rx haskell-align-imports
haskell-complete-module haskell-ghc-support etags fileloop generator dabbrev
haskell-customize hydra lv use-package-ensure paren magit-patch-changelog
magit-patch 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 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 dired
dired-loaddefs rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader pcvs-util add-log with-editor
async-bytecomp async pcase server dash flx-ido flx solarized-theme
solarized-definitions projectile ibuf-ext ibuffer ibuffer-loaddefs grep gnus
nnheader gnus-util rmail rmail-loaddefs rfc2047 rfc2045 ietf-drums
text-property-search time-date mail-utils mm-util mail-prsvr
google-translate-default-ui google-translate-core-ui ido google-translate-core
google-translate-tk google-translate-backend use-package-bind-key bind-key
auto-complete popup cus-edit cus-start cus-load wid-edit ess-r-mode
ess-r-flymake flymake-proc flymake warnings thingatpt ess-r-xref xref ess-trns
ess-r-package shell pcomplete ess-r-completion ess-roxy ess-r-syntax ess-rd
noutline outline easy-mmode hideshow ess-s-lang ess-help ess-mode ess-inf
project format-spec ess-tracebug ess ess-utils ess-custom compile comint
ansi-color ace-window avy emms-player-mplayer emms-player-simple emms
emms-compat twittering-mode epa derived epg epg-config tls gnutls puny url
url-proxy url-privacy url-expand url-methods url-history url-cookie url-domsuf
url-util mailcap advice xml cl cl-extra help-mode use-package-core hl-line
winner ring finder-inf howdoyou-autoloads json-reformat-autoloads
json-snatcher-autoloads edmacro kmacro sml-mode-autoloads
tornado-template-mode-autoloads info package easymenu browse-url 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 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 loaddefs button faces cus-face
macroexp files text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads dbusbind inotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 2837923 335204)
 (symbols 48 68479 7)
 (strings 32 310282 45071)
 (string-bytes 1 12130316)
 (vectors 16 284437)
 (vector-slots 8 8125148 365738)
 (floats 8 4275 5269)
 (intervals 56 84405 4029)
 (buffers 1000 245))

bug#43538: 27.1; Hiding the thread moved us backwards, aborting!

[Lars Ingebrigtsen]

dick <dick.r.chiang@gmail.com> writes:

> In a gnus summary buffer, hide all threads `T H`.  A search via `M-s` for an
> arbitrary search term yields the ominous and enigmatic "Hiding the thread
> moved us backwards, aborting!"

I tried a `T H' and then a `M-s M-s' now, but I was unable to reproduce
this bug.  Is there anything more needed in the recipe?

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

bug#43538: 27.1; Hiding the thread moved us backwards, aborting!

[dick.r.chiang]

EMACS=${EMACS:-emacs}
${EMACS} -Q \
--eval "(custom-set-variables \
 '(network-security-level (quote low)) \
 '(gnus-interactive-exit (quote quiet)) \
 '(gnus-large-newsgroup 4000) \
 '(gnus-select-method (quote (nntp \"news.gmane.io\" ))) \
 '(gnus-add-timestamp-to-message (quote log)) \
 '(gnus-before-startup-hook (quote (toggle-debug-on-error))) \
 '(gnus-always-read-dribble-file t) \
 '(gnus-read-newsrc-file nil) \
 '(gnus-parameters (quote ((\"^nntp\" (display . 1000))))) \
 '(gnus-summary-prepared-hook (quote (gnus-summary-hide-all-threads))) \
 '(gnus-startup-file \"/var/tmp/foo\") \
 )" \
-f gnus \
--eval "(gnus-server-open-all-servers)" \
--eval "(gnus-fetch-group \"nntp+news.gmane.io:gmane.emacs.gnus.general\")" \
--eval "(gnus-summary-search-article-forward \"maildir\")"

bug#43538: 27.1; Hiding the thread moved us backwards, aborting!

[Lars Ingebrigtsen]

dick.r.chiang@gmail.com writes:

> EMACS=${EMACS:-emacs}
> ${EMACS} -Q \
> --eval "(custom-set-variables \

Thanks; applied the patch to Emacs 28.

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