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[debbugs-tracker] bug#31378: closed (25.2; visual-line-mode freezes Emac

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#31378: closed (25.2; visual-line-mode freezes Emacs, unresponsive to C-g)
Date: Tue, 08 May 2018 17:18:03 +0000

Your message dated Tue, 08 May 2018 20:16:50 +0300
with message-id <address@hidden>
and subject line Re: bug#30432: 26.0.91; freeze when text wrap-prefix exceeds 
window text width
has caused the debbugs.gnu.org bug report #30432,
regarding 25.2; visual-line-mode freezes Emacs, unresponsive to C-g
to be marked as done.

(If you believe you have received this mail in error, please contact

30432: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=30432
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: 25.2; visual-line-mode freezes Emacs, unresponsive to C-g Date: Mon, 07 May 2018 07:58:32 -0700 (PDT)
To reproduce the problem:
 * emacs -Q
 * visit the attached text (file long-visual-line-repro.el) in a buffer
 * M-x eval-buffer
* C-n through the buffer until Emacs freezes, on the long "xxx...xxx" line

Emacs freezes, uses 100% of CPU, and is unresponsive to C-g keystrokes.

From cursory experimentation, the problem seems to occur when both the
wrap-prefix, and a single word, are longer than the Emacs window is wide.

This bug freezes my Emacs frequently.

                    -Michael Ernst

In GNU Emacs 25.2.2 (x86_64-pc-linux-gnu, GTK+ Version 3.22.21)
 of 2017-09-22, modified by Debian built on lgw01-amd64-050
Windowing system distributor 'The X.Org Foundation', version 11.0.11905000
System Description:     Ubuntu 17.10

Configured using:
'configure --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --enable-locallisppath=/etc/emacs25:/etc/emacs:/usr/local/share/emacs/25.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.2/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes --enable-locallisppath=/etc/emacs25:/etc/emacs:/usr/local/share/emacs/25.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.2/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars 'CFLAGS=-g -O2 -fdebug-prefix-map=/build/emacs25-jYekUr/emacs25-25.2+1=. -fstack-protector-strong -Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

Configured features:

Important settings:
  value of $LC_ALL: en_US.utf8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Text

Minor modes in effect:
  global-semanticdb-minor-mode: t
  global-semantic-idle-scheduler-mode: t
  semantic-mode: t
  magit-auto-revert-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  diff-auto-refine-mode: t
  adaptive-wrap-prefix-mode: t
  dired-omit-mode: t
  global-edit-server-edit-mode: t
  type-break-mode: t
  dtrt-indent-mode: t
  ido-everywhere: t
  shell-dirtrack-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
  visual-line-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent messages:
Saving file /home/mernst/Mail/draft/1...
Wrote /home/mernst/Mail/draft/1
Reverting buffer ‘mew-mde.el’.
command-execute: Command attempted to use minibuffer while in minibuffer
Commands: d, s, x, u; f, o, 1, 2, m, v; ~, %; q to quit; ? for help.
Mark set [3 times]
Saving file /home/mernst/sync/long-visual-line-repro.el...
Wrote /home/mernst/sync/long-visual-line-repro.el

Load-path shadows:
/usr/share/emacs/25.2/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup /usr/share/emacs25/site-lisp/cmake-data/cmake-mode hides /usr/share/emacs/site-lisp/cmake-mode

(shadow emacsbug semantic/html sgml-mode tramp-cmds tramp-cache tramp-sh bdiff semantic/tag-write semantic/decorate/mode semantic/edit semantic/dep semantic/tag-file semantic/db-find semantic/db-ref semantic/db-mode semantic/wisent/java-tags semantic/wisent/javat-wy semantic/wisent semantic/wisent/wisent google-c-style jdee-plugins jdee derived jdee-wiz jdee-test jdee-archive memoize jdee-stacktrace jdee-refactor jdee-project-file jdee-maven jdee-keys jdee-jdb jdee-java-grammar jdee-which-method jdee-font-lock jdee-issues jdee-help jdee-gen tempo jdee-find jdee-deps jdee-cygwin jdee-custom jdee-compile jdee-class jdee-bytecode jdee-bug jdee-run jdee-jdk-manager jdee-dbs jdee-dbo jdee-widgets tree-widget jdee-db jdee-open-source semantic/senator semantic/decorate pulse jdee-import jdee-complete semantic/idle jdee-parse jdee-backend jdee-bsh jdee-util jdee-parse-expr beanshell rx jdee-imenu semantic/imenu semantic/sb semantic/sort semantic/db-file data-debug cedet-files semantic/db eieio-base semantic/java semantic/format semantic/tag-ls semantic/find semantic/doc semantic/ctxt semantic/util-modes semantic/util semantic semantic/tag semantic/lex semantic/fw mode-local efc eieio-compat avl-tree jdee-annotations jdee-abbrev jdee-classpath jdee-files jdee-activator jdee-log cus-edit cus-start cus-load wid-edit cedet compare-w bbdb-gui tabify imenu man url-http url-gw url-auth url-queue url-cache url url-proxy url-privacy url-expand url-methods url-history url-cookie url-domsuf mailcap shr-color color url-util shr dom subr-x bbdb-hooks mail-extr rmail-mde mail-simplify mailalias rmail bbdb-com qp network-stream nsm starttls tls gnutls bbdb-mew mew-varsx mew-unix mew-mde mew-auth mew-config mew-imap2 mew-imap mew-nntp2 mew-nntp mew-pop mew-smtp mew-ssl mew-ssh mew-net mew-highlight mew-sort mew-fib mew-ext mew-refile mew-demo mew-attach mew-draft mew-message mew-thread mew-virtual mew-summary4 mew-summary3 mew-summary2 mew-summary mew-search mew-pick mew-passwd mew-scan mew-syntax mew-bq mew-smime mew-pgp mew-header mew-exec mew-mark mew-mime mew-edit mew-decode mew-encode mew-cache mew-minibuf mew-complete mew-addrbook mew-local mew-vars3 mew-vars2 mew-vars mew-env mew-mule3 mew-mule mew-gemacs mew-key mew-func mew-blvs mew-const mew pp magit-extras dabbrev vc vc-dispatcher jka-compr eieio-opt speedbar sb-image ezimage dframe find-func misearch multi-isearch magit-obsolete magit-blame magit-stash magit-bisect magit-remote magit-commit magit-sequence magit-notes magit-worktree magit-branch magit-files magit-refs magit-status magit magit-repos magit-apply magit-wip magit-log magit-diff smerge-mode magit-core magit-autorevert autorevert filenotify magit-process magit-margin magit-mode magit-git magit-section magit-popup git-commit magit-utils crm log-edit message rfc822 mml mml-sec epg mm-decode mm-bodies mm-encode mail-parse rfc2231 gmm-utils mailheader pcvs-util add-log with-editor async-bytecomp async dash vc-git pt grep diff-mode diff time-stamp adaptive-wrap dired-aux dired-mde arc-mode archive-mode dired-x dired dot-emacs bbdb-autoloads fill-column-indicator edit-server edmacro kmacro warnings server ff-paths ffap url-parse url-vars type-break ftp-mde sendmail-mde rmail-addresses-mde ispell mail-utils-mde startup-functions-mde etags-mde sendmail rfc2047 rfc2045 ietf-drums mail-utils prog-modes-mde honorary-compile inf-lisp perl-mode sh-script smie cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine yaml-mode dtrt-indent mode-hooks-mde mouse-goto-error etags xref project bibtex util-mde inleft darken-lighten-face buffer-menu-mde mailabbrev bbdb-mde bbdb timezone edebug benchmark-init finder-inf info package epg-config ido seq ess-toolbar ess-mouse mouseme thingatpt browse-url ess-menu ess-swv ess-noweb ess-noweb-font-lock-mode ess-bugs-l essd-els ess-sas-d ess-sas-l ess-sas-a ess-sta-d ess-sta-l cc-vars cc-defs make-regexp ess-sp6-d ess-dde ess-sp3-d ess-julia ess-r-d ess-r-syntax ess-r-completion ess-roxy essddr noutline outline easy-mmode hideshow ess-help ess-r-package ess-s-l ess ess-inf ess-tracebug compile tramp tramp-compat auth-source cl-seq eieio byte-opt bytecomp byte-compile cl-extra cconv eieio-core gnus-util mm-util help-fns help-mode mail-prsvr password-cache tramp-loaddefs cl-macs trampver ucs-normalize shell pcomplete comint ansi-color ring format-spec advice ess-mode ess-noweb-mode ess-utils ess-generics cl gv cl-loaddefs pcase cl-lib ess-custom executable easymenu ess-compat ess-site time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame 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 charscript case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer 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 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 1499516 923741)
 (symbols 48 103741 1)
 (miscs 40 23424 3276)
 (strings 32 368311 32240)
 (string-bytes 1 8130841)
 (vectors 16 132467)
 (vector-slots 8 2519468 56612)
 (floats 8 1661 1062)
 (intervals 56 37382 6051)
 (buffers 976 192))
;;; To reproduce the problem:
;;;  * emacs -Q
;;;  * visit this text in a buffer
;;;  * M-x eval-buffer
;;; * C-n through the buffer until Emacs freezes, on the long "xxx...xxx" line

;;; short line
;;; long line long line long line long line long line long line long line long line long line long line
;;; short line
;;; xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
;;; short line

  ;; (find-file "~/tmp/longline.txt-BAD-1")
  (visual-line-mode 1)
  ;; wrap-prefix for second line is 100 spaces
  (put-text-property 199 302 'wrap-prefix (make-string 100 32))
  ;; wrap-prefix for fourth line is 100 spaces
  (put-text-property 318 422 'wrap-prefix (make-string 100 32))

;;; Emacs freezes, uses 100% of CPU, and is unresponsive to C-g keystrokes.

;;; From cursory experimentation, the problem seems to occur when both the
;;; wrap-prefix, and a single word, are longer than the Emacs window is wide.
--- End Message ---
--- Begin Message --- Subject: Re: bug#30432: 26.0.91; freeze when text wrap-prefix exceeds window text width Date: Tue, 08 May 2018 20:16:50 +0300
> From: "Paul W. Rankin" <address@hidden>
> Date: Tue, 8 May 2018 17:29:36 +1000
> All look perfect on my end when built from master.

Great, thanks for testing.  I'm therefore closing this bug.

--- End Message ---

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