X-Loop: help-debbugs@HIDDEN Subject: bug#34823: 27.0.50; re-search-forward infloop Resent-From: Vitalie Spinu <spinuvit@HIDDEN> Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> Resent-CC: bug-gnu-emacs@HIDDEN Resent-Date: Tue, 12 Mar 2019 10:50:01 +0000 Resent-Message-ID: <handler.34823.B.1552387798826 <at> debbugs.gnu.org> Resent-Sender: help-debbugs@HIDDEN X-GNU-PR-Message: report 34823 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 34823 <at> debbugs.gnu.org X-Debbugs-Original-To: bug-gnu-emacs@HIDDEN Received: via spool by submit <at> debbugs.gnu.org id=B.1552387798826 (code B ref -1); Tue, 12 Mar 2019 10:50:01 +0000 Received: (at submit) by debbugs.gnu.org; 12 Mar 2019 10:49:58 +0000 Received: from localhost ([127.0.0.1]:39786 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1h3eyr-0000DF-Ah for submit <at> debbugs.gnu.org; Tue, 12 Mar 2019 06:49:57 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33839) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <spinuvit@HIDDEN>) id 1h3eyo-0000D1-Sq for submit <at> debbugs.gnu.org; Tue, 12 Mar 2019 06:49:55 -0400 Received: from lists.gnu.org ([209.51.188.17]:42399) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from <spinuvit@HIDDEN>) id 1h3eyj-0000pn-JL for submit <at> debbugs.gnu.org; Tue, 12 Mar 2019 06:49:49 -0400 Received: from eggs.gnu.org ([209.51.188.92]:48183) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <spinuvit@HIDDEN>) id 1h3eyh-0005OC-De for bug-gnu-emacs@HIDDEN; Tue, 12 Mar 2019 06:49:49 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,FREEMAIL_FROM, URIBL_BLOCKED autolearn=disabled version=3.3.2 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <spinuvit@HIDDEN>) id 1h3eyf-0000o1-Jg for bug-gnu-emacs@HIDDEN; Tue, 12 Mar 2019 06:49:47 -0400 Received: from mail-ed1-x532.google.com ([2a00:1450:4864:20::532]:45805) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from <spinuvit@HIDDEN>) id 1h3eyf-0000ne-6a for bug-gnu-emacs@HIDDEN; Tue, 12 Mar 2019 06:49:45 -0400 Received: by mail-ed1-x532.google.com with SMTP id f19so1827538eds.12 for <bug-gnu-emacs@HIDDEN>; Tue, 12 Mar 2019 03:49:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:user-agent:mime-version; bh=iuVqsJGu7A5H2StREwLgp1kYPAkIwm+U/O4VUvMlvaY=; b=MEaMHyj+ImOeRZi3cnJCO8eFxEPqLyAPMXsx0ss2iNbejkFSi9ym7tV+kEpM1Aw5Vd wgEBN4qPno4xbbItqyuypo3YpoQzyGJe4q1+IQv64mpbIcenOnEO7hLsDzM811jeRGWw rwl6P/7Ce+gVBq8FtUF9dInak54YLj+INn61yZaphWDEccFP8xYI5YWBSL1PrzqAZ7UQ zUVWpIyfDD3x7k6pizjCgV7SYaMmyXD5giTK8P6tQBSIGkwSy6q/CHZ7ynUtg470BTUn SMHYCsuAVbbtruKo80A24dZjoYu5/B5x3UBF9/7I/2HJA/o1Y9IGyghQ/KHD4j6MjViE kcUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:user-agent :mime-version; bh=iuVqsJGu7A5H2StREwLgp1kYPAkIwm+U/O4VUvMlvaY=; b=mqGOUeO3Ng4bjb/Ne/OStPKLk1kl8yNAE3AByPWHq2FKgerhFFBpQ5mT7gUUNEmXzj TIhxyG1JlmdkVy5wYUH6Tsu3n03+mJKD3dG/WL2TNs+VlcJ3R/G0hMTz4QgxaWQwOzbe P5YovYscLrSgd1qpBhk01+PpBw1hii58Qi+lsXwl2JdTHJJKpTh3641z2eKpAU/GHfvO rvdQOuWNVIB6rH7eI8iJFPBRnGodmLUWUGMxMtI82VGg3Ng31k4dGaqO9lmOlROm/eaE +RKdXa8rBaQ3pkP1AEeHAePviFoW9jJPKalEuLJSUyklyZEn0Kg4ItVoTCL3BWWcOIgg ExeQ== X-Gm-Message-State: APjAAAWKM22guxaO2Kxy9ZEV0g/7yw3fgxF9WL5FQ9LhM5pnlb9Hd+3h BA19FoUVvge2Z2ty1EwNLDPjT7U8 X-Google-Smtp-Source: APXvYqyEDGXsqzeOIMiou8Kq55w0ADzfnHNIuXwu1IQpisS8dk20CL/lzkEKR/LFept5NBPxp5O+Gg== X-Received: by 2002:a17:906:518:: with SMTP id j24mr1467500eja.26.1552387782631; Tue, 12 Mar 2019 03:49:42 -0700 (PDT) Received: from localhost ([145.5.121.125]) by smtp.gmail.com with ESMTPSA id z39sm5535604edc.96.2019.03.12.03.49.41 for <bug-gnu-emacs@HIDDEN> (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 12 Mar 2019 03:49:41 -0700 (PDT) From: Vitalie Spinu <spinuvit@HIDDEN> Date: Tue, 12 Mar 2019 11:49:40 +0100 Message-ID: <87y35kqse3.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::532 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Spam-Score: 1.0 (+) X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) Hi, In the context of markdown-mode I am seeing a font-lock infloop with a relatively simple regexp: 1) emacs -Q 2) open a buffer with the following line "$_\t$tmp\t$cat\t$donor\t$stage\t$pool\t$rep\t$time\t$comment"' 3) at bol eval (re-search-forward "\\(\\w[^\n]*\\)+}") which infloops I see it with emacs 25, 26 and 27.0.5. Vitalie ---- In GNU Emacs 27.0.50 (build 7, x86_64-pc-linux-gnu, GTK+ Version 3.22.30) of 2018-08-31 built on Galago Repository revision: 244b6827257fb0ec9c14f19b9dd01a0e1bee1d75 Windowing system distributor 'The X.Org Foundation', version 11.0.11906000 System Description: Ubuntu 18.04.1 LTS Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. (New file) Mark set Quit [2 times] Mark activated [4 times] ido-read-internal: Command attempted to use minibuffer while in minibuffer Quit [3 times] ido-read-internal: Command attempted to use minibuffer while in minibuffer Quit [2 times] ad-Advice-delete-char: Text is read-only [3 times] Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 THREADS LCMS2 Important settings: value of $LC_MONETARY: nl_NL.UTF-8 value of $LC_NUMERIC: nl_NL.UTF-8 value of $LC_TIME: en_DK.UTF-8 value of $LANG: en_GB.UTF-8 locale-coding-system: utf-8-unix Major mode: Fundamental Minor modes in effect: smartparens-global-mode: t smartparens-mode: t TeX-PDF-mode: t helm-cider-mode: t global-eclim-mode: t display-time-mode: t helm-descbinds-mode: t openwith-mode: t pdf-occur-global-minor-mode: t global-edit-server-edit-mode: t global-company-mode: t company-mode: t 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/home/vspinu/Dropbox/ELPA/projectile-20180824.2239/projectile hides ~/VC/projectile/projectile /home/vspinu/Dropbox/ELPA/auto-complete-20170125.245/auto-complete-pkg hides ~/VC/auto-complete/auto-complete-pkg /home/vspinu/Dropbox/ELPA/auto-complete-20170125.245/auto-complete-config hides ~/VC/auto-complete/auto-complete-config /home/vspinu/Dropbox/ELPA/auto-complete-20170125.245/auto-complete hides ~/VC/auto-complete/auto-complete /home/vspinu/Dropbox/ELPA/color-theme-solarized-20171024.1525/solarized-theme hides ~/VC/solarized-emacs/solarized-theme /home/vspinu/Dropbox/ELPA/queue-0.2/queue hides ~/Dropbox/.emacs.d/queue ~/VC/markdown-mode/markdown-mode hides ~/Dropbox/.emacs.d/markdown-mode /home/vspinu/Dropbox/ELPA/rebox2-20121113.2100/rebox2 hides ~/Dropbox/.emacs.d/rebox2 ~/Dropbox/.emacs.d/allout-widgets hides /home/vspinu/bin/emacs/lisp/allout-widgets ~/Dropbox/.emacs.d/allout hides /home/vspinu/bin/emacs/lisp/allout /home/vspinu/Dropbox/ELPA/less-css-mode-20161001.453/less-css-mode hides /home/vspinu/bin/emacs/lisp/textmodes/less-css-mode ~/Dropbox/.emacs.d/org-protocol hides /home/vspinu/bin/emacs/lisp/org/org-protocol ~/Dropbox/.emacs.d/tabulated-list hides /home/vspinu/bin/emacs/lisp/emacs-lisp/tabulated-list Features: (shadow sort mail-extr emacsbug message rmc puny rfc822 mml mml-sec epa epg gnus-util rmail rmail-loaddefs mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils smex aggressive-indent rainbow-delimiters bug-reference pig-snippets yasnippet-snippets yasnippet elec-pair server hc-zenburn-theme eldoc-eval zotelo vlf vlf-base vlf-tune my-smartparens-config smartparens-config smartparens-ruby smartparens-org smartparens-markdown smartparens-text smartparens-latex smartparens-html smartparens-ess smartparens-clojure smartparens polymode-test-utils ert ewoc debug polymode-debug trace poly-erb poly-rst rst poly-org poly-slim slim-mode ruby-mode poly-R poly-markdown poly-noweb polymode poly-lock polymode-base polymode-weave polymode-export polymode-compat polymode-methods polymode-core polymode-classes eieio-custom eieio-base markdown-mode ess-site ess-toolbar ess-mouse mouseme ess-jags-d ess-bugs-l essd-els ess-stata-mode ess-stata-lang make-regexp ess-sas-d ess-sas-l ess-sas-a ess-julia julia-mode latex latex-flymake tex-ispell tex-style reftex-cite reftex reftex-loaddefs reftex-vars tex dbus crm ess-r-mode ess-r-flymake flymake-proc flymake ess-r-xref ess-r-package ess-r-completion ess-roxy ess-r-syntax ess-rd hideshow ess-sp6-d ess-trns ess-s-lang ess-help ess-mode ess-inf ess-tracebug ess ess-utils ess-custom cider-ns cider-find helm-cider helm-cider-spec helm-cider-repl helm-cider-cheatsheet helm-cider-util cider-cheatsheet cider-decompile javap-mode cider-apropos apropos cider-macroexpansion cider-selector cider-scratch cider cider-debug cider-browse-ns cider-inspector 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cap-words superword subword delsel ido imenu-anywhere imenu iflipb edmacro kmacro finder-inf package easymenu epg-config url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache json map url-vars seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib time-date mule-util 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 menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors 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 composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray 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 threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 972819 26432) (symbols 48 68247 1) (miscs 40 129 226) (strings 32 246201 16927) (string-bytes 1 6790923) (vectors 16 92395) (vector-slots 8 1708820 15212) (floats 8 481 583) (intervals 56 4552 46) (buffers 992 16))
Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.505 (Entity 5.505) Content-Type: text/plain; charset=utf-8 X-Loop: help-debbugs@HIDDEN From: help-debbugs@HIDDEN (GNU bug Tracking System) To: Vitalie Spinu <spinuvit@HIDDEN> Subject: bug#34823: Acknowledgement (27.0.50; re-search-forward infloop) Message-ID: <handler.34823.B.1552387798826.ack <at> debbugs.gnu.org> References: <87y35kqse3.fsf@HIDDEN> X-Gnu-PR-Message: ack 34823 X-Gnu-PR-Package: emacs Reply-To: 34823 <at> debbugs.gnu.org Date: Tue, 12 Mar 2019 10:50:01 +0000 Thank you for filing a new bug report with debbugs.gnu.org. This is an automatically generated reply to let you know your message has been received. Your message is being forwarded to the package maintainers and other interested parties for their attention; they will reply in due course. Your message has been sent to the package maintainer(s): bug-gnu-emacs@HIDDEN If you wish to submit further information on this problem, please send it to 34823 <at> debbugs.gnu.org. Please do not send mail to help-debbugs@HIDDEN unless you wish to report a problem with the Bug-tracking system. --=20 34823: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D34823 GNU Bug Tracking System Contact help-debbugs@HIDDEN with problems
X-Loop: help-debbugs@HIDDEN Subject: bug#34823: 27.0.50; re-search-forward infloop References: <87y35kqse3.fsf@HIDDEN> In-Reply-To: <87y35kqse3.fsf@HIDDEN> Resent-From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> Resent-CC: bug-gnu-emacs@HIDDEN Resent-Date: Fri, 29 Mar 2019 13:29:02 +0000 Resent-Message-ID: <handler.34823.B34823.15538661051412 <at> debbugs.gnu.org> Resent-Sender: help-debbugs@HIDDEN X-GNU-PR-Message: followup 34823 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 34823 <at> debbugs.gnu.org Received: via spool by 34823-submit <at> debbugs.gnu.org id=B34823.15538661051412 (code B ref 34823); Fri, 29 Mar 2019 13:29:02 +0000 Received: (at 34823) by debbugs.gnu.org; 29 Mar 2019 13:28:25 +0000 Received: from localhost ([127.0.0.1]:35114 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1h9rYX-0000Mh-2u for submit <at> debbugs.gnu.org; Fri, 29 Mar 2019 09:28:25 -0400 Received: from mail232c50.megamailservers.eu ([91.136.10.242]:46516 helo=mail37c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1h9rYT-0000MT-QM for 34823 <at> debbugs.gnu.org; Fri, 29 Mar 2019 09:28:23 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1553866100; bh=erEXikwqHFLGYREx7nDMVQaGCziQHvr9FTihQ3NjkNI=; h=From:Subject:Date:To:From; b=TueRY8Tj9lHjeqb6OHFU0UxWZTpl8LH7KAXoMfkdqczjU/cOv9eNotODiPIL+9aoU mERu260+OaYKUdRUr/YD1R819sJ8f7wof8elrj3FEnW1H5kkMQlt155Z2aBIr0Cm2U /90V6dlp9wg0vBKYIoKn2OXbDEJR4bBPvU5RRTT4= Feedback-ID: mattiase@HIDDEN Received: from [192.168.1.64] (c-e636e253.032-75-73746f71.bbcust.telenor.se [83.226.54.230]) (authenticated bits=0) by mail37c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id x2TDSIvY001592 for <34823 <at> debbugs.gnu.org>; Fri, 29 Mar 2019 13:28:20 +0000 From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.8\)) Message-Id: <B5915A5D-14EB-47F6-99EC-26AD8C7C7D5E@HIDDEN> Date: Fri, 29 Mar 2019 14:28:18 +0100 X-Mailer: Apple Mail (2.3445.104.8) X-CTCH-RefID: str=0001.0A0B0206.5C9E1D74.0016, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=J+uEEjvS c=1 sm=1 tr=0 a=M+GU/qJco4WXjv8D6jB2IA==:117 a=M+GU/qJco4WXjv8D6jB2IA==:17 a=kj9zAlcOel0A:10 a=mDV3o1hIAAAA:8 a=s9nx60t4IFD1f2rHLaIA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 0.3 (/) X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.7 (/) It is not actually an infinite loop; it just takes a very long time. Your case is, more or less, essentially (search-string "\\(?:a*\\)*b" "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") Try trimming the string, and you will see that the match does terminate = (and fail); it is just super-linear in the length of the text. This is a shortcoming of the general type of regexp engine used by = Emacs. To work around your problem, you should make the regexp less prone to = backtracking. Try asking on the list help-gnu-emacs@HIDDEN for advice. = Describe what text you wish to match as precisely as possible.
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