From debbugs-submit-bounces@debbugs.gnu.org Fri Dec 24 03:22:19 2010 Received: (at submit) by debbugs.gnu.org; 24 Dec 2010 08:22:19 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PW2un-0005jQ-Mb for submit@debbugs.gnu.org; Fri, 24 Dec 2010 03:22:19 -0500 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PW2uj-0005jD-9n for submit@debbugs.gnu.org; Fri, 24 Dec 2010 03:22:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PW317-0004ZJ-OM for submit@debbugs.gnu.org; Fri, 24 Dec 2010 03:28:52 -0500 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([199.232.76.165]:56258) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PW317-0004ZD-Fk for submit@debbugs.gnu.org; Fri, 24 Dec 2010 03:28:49 -0500 Received: from [140.186.70.92] (port=47759 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PW314-0005Qo-4G for bug-gnu-emacs@gnu.org; Fri, 24 Dec 2010 03:28:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PW310-0004Xl-Q7 for bug-gnu-emacs@gnu.org; Fri, 24 Dec 2010 03:28:46 -0500 Received: from deliver.uni-koblenz.de ([141.26.64.15]:16340) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PW310-0004XF-5t for bug-gnu-emacs@gnu.org; Fri, 24 Dec 2010 03:28:42 -0500 Received: from localhost (localhost [127.0.0.1]) by deliver.uni-koblenz.de (Postfix) with ESMTP id F40217801680 for ; Fri, 24 Dec 2010 09:28:40 +0100 (CET) Received: from deliver.uni-koblenz.de ([127.0.0.1]) by localhost (deliver.uni-koblenz.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 10388-04 for ; Fri, 24 Dec 2010 09:28:36 +0100 (CET) X-CHKRCPT: Envelopesender noch tassilo@member.fsf.org Received: from thinkpad (tsdh.uni-koblenz.de [141.26.67.142]) by deliver.uni-koblenz.de (Postfix) with ESMTP id 8F6D07801676 for ; Fri, 24 Dec 2010 09:28:36 +0100 (CET) From: Tassilo Horn To: bug-gnu-emacs@gnu.org Subject: 24.0.50; Finding this C++ header file drops emacs into a infinite loop Date: Fri, 24 Dec 2010 09:28:36 +0100 Message-ID: <87fwtnbmmj.fsf@member.fsf.org> User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/24.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Virus-Scanned: amavisd-new at uni-koblenz.de X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Spam-Score: -6.5 (------) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -6.5 (------) Orininally reported by Caligo in gmane.emacs.help (). He uses GNU Emacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1), but the bug in still in the current bzr trunk. 1. emacs -Q bug.hpp 2. emacs loops infinitely using 100% CPU resources The offending file is that (according to the original reporter, the spaces and empty lines are needed): --8<---------------cut here---------------start------------->8--- class ConversionConsole : public QWidget{ private: typedef boost::array InputLines; typedef cons > > > > > > > > > > > > > > > > > > > > > ColorSpaces; }; --8<---------------cut here---------------end--------------->8--- In GNU Emacs 24.0.50.1 (x86_64-pc-linux-gnu) of 2010-12-21 on thinkpad Windowing system distributor `The X.Org Foundation', version 11.0.10902902 configured using `configure '--prefix=/usr' '--build=x86_64-pc-linux-gnu' '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc' '--localstatedir=/var/lib' '--libdir=/usr/lib64' '--program-suffix=-emacs-24' '--infodir=/usr/share/info/emacs-24' '--with-crt-dir=/usr/lib64' '--without-compress-info' '--with-sound' '--with-x' '--without-gconf' '--with-xml2' '--without-toolkit-scroll-bars' '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff' '--with-xpm' '--with-imagemagick' '--with-xft' '--with-libotf' '--with-m17n-flt' '--with-x-toolkit=no' '--without-hesiod' '--without-kerberos' '--without-kerberos5' '--with-gpm' '--with-dbus' '--with-gnutls' '--without-selinux' 'build_alias=x86_64-pc-linux-gnu' 'host_alias=x86_64-pc-linux-gnu' 'CFLAGS=-march=native -O2 -pipe' 'LDFLAGS=-Wl,-O1 -Wl,--as-needed' 'CPPFLAGS='' Important settings: value of $LC_ALL: nil value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: en_US.UTF-8 value of $XMODIFIERS: nil locale-coding-system: utf-8-unix default enable-multibyte-characters: t Major mode: Message Minor modes in effect: gnus-message-citation-mode: t diff-auto-refine-mode: t mml-mode: t global-auto-complete-mode: t auto-complete-mode: t yas/minor-mode: t recentf-mode: t window-number-meta-mode: t window-number-mode: t global-subword-mode: t subword-mode: t savehist-mode: t show-paren-mode: t tooltip-mode: t mouse-wheel-mode: t menu-bar-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 Recent input: u d i n g SPC t h e SPC b a d SPC h p p SPC f i l e SPC u s i n g M-q SPC M - x SPC r e p - e m M-/ SPC z ? b C-c C-c C-g C-g SPC SPC SPC SPC SPC SPC F C-k N e x t SPC t i b e m e , SPC s i m p l y SPC c o p y SPC t h e SPC c o n t e n t s SPC o f SPC t h e SPC b u g SPC r e p o r t SPC b u f f e r SPC i n t o SPC y o u r SPC e m a c u s u a l SPC e m a i i l SPC c l e i i o e n t SPC a n d SPC s e n d SPC f r o m SPC t h a t . C-a C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k C-k I ' l l SPC d o . b M-x r e p o r t Recent messages: Sending... Sending news via Gmane using nntp... Wrote /home/horn/.gnus.d/News/archive/sent-postings/902 Sending...done Quit [2 times] Mark set [2 times] kill-line: End of buffer [3 times] [yas] snippet expanded. [yas] snippet 3 exited. Making completion list... 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password-cache dig gravatar gnus-topic gnus-registry nnir gnus-sum macroexp nnoo gnus-group gnus-undo nnmail mail-source th-private gnus-start gnus-spec gnus-int gnus-range gnus-win eldoc go-mode-load flymake greqlscript-mode greql-mode tg-mode generic th-latex paredit dvc-autoloads dvc-core dvc-lisp dvc-buffers dvc-ui dvc-register dvc-utils dvc-emacs ewoc dvc-defs dvc-site magit diff-mode log-edit pcvs-util add-log magit-key-mode epa-file epa epg epg-config wtf cus-edit cus-start cus-load rdictcc org-location-google-maps google-maps google-maps-static google-maps-geocode google-maps-base json org-google-weather format-spec google-weather xml url-cache org-beamer solar cal-dst holidays hol-loaddefs appt diary-lib diary-loaddefs vc-git hl-line org-w3m org-irc org-jsinfo org-infojs org-html org-exp ob-exp org-exp-blocks org-info org-gnus org-docview org-bibtex org-bbdb org-protocol org-attach org-id org-agenda org ob-emacs-lisp ob-tangle ob-ref ob-lob ob-table org-footnote org-src ob-comint ob-keys ob ob-eval org-complete pcomplete org-list org-faces org-compat org-entities org-macs time-date org-install cal-menu calendar cal-loaddefs dired-x dired-aux highlight-symbol hi-lock th-boxquote boxquote rect ecomplete message idna sendmail rfc822 mml mml-sec mm-decode mm-bodies mm-encode mailabbrev gmm-utils mailheader info server auto-complete-config auto-complete popup yasnippet dropdown-list help-mode view disp-table noutline outline browse-kill-ring derived recentf tree-widget sr-speedbar speedbar sb-image ezimage dframe assoc anything-config warnings compile comint ring browse-url semantic/util-modes semantic/util semantic semantic/tag semantic/lex semantic/fw eieio byte-opt bytecomp byte-compile mode-local cedet imenu bookmark pp easymenu rx ffap thingatpt anything window-number easy-mmode uniquify subword saveplace savehist paren lusty-explorer dired cl edmacro kmacro advice help-fns advice-preload th-common mm-url gnus gnus-ems nnheader mail-utils wid-edit url-http tls url url-proxy url-privacy url-expand url-methods url-history mailcap url-auth mail-parse rfc2231 rfc2047 rfc2045 ietf-drums url-cookie url-util url-parse auth-source netrc gnus-util url-gw url-vars mm-util mail-prsvr windmove gnus-load site-gentoo preview-latex bbdb-autoloads bbdb regexp-opt timezone tex-site auto-loads tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev loaddefs button minibuffer faces cus-face files text-properties overlay md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process dbusbind dynamic-setting font-render-setting x multi-tty emacs) From debbugs-submit-bounces@debbugs.gnu.org Sat Jan 22 15:26:10 2011 Received: (at control) by debbugs.gnu.org; 22 Jan 2011 20:26:10 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Pgk2E-0003QI-KQ for submit@debbugs.gnu.org; Sat, 22 Jan 2011 15:26:10 -0500 Received: from vm-emlprdomr-03.its.yale.edu ([130.132.50.144]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Pgk2C-0003Q6-JM for control@debbugs.gnu.org; Sat, 22 Jan 2011 15:26:08 -0500 Received: from furball (c-71-192-165-84.hsd1.ct.comcast.net [71.192.165.84]) (authenticated bits=0) by vm-emlprdomr-03.its.yale.edu (8.14.4/8.14.4) with ESMTP id p0MKY5CG023997 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sat, 22 Jan 2011 15:34:06 -0500 Received: by furball (Postfix, from userid 1000) id B3F7A1611FB; Sat, 22 Jan 2011 15:34:04 -0500 (EST) From: Chong Yidong To: control@debbugs.gnu.org Subject: severity 7722 serious Date: Sat, 22 Jan 2011 15:34:04 -0500 Message-ID: <87aaisn0eb.fsf@stupidchicken.com> MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.71 on 130.132.50.144 X-Spam-Score: -2.7 (--) X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -2.7 (--) severity 7722 serious thanks From debbugs-submit-bounces@debbugs.gnu.org Sat Jan 22 15:29:30 2011 Received: (at 7722) by debbugs.gnu.org; 22 Jan 2011 20:29:30 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Pgk5R-0003Up-RW for submit@debbugs.gnu.org; Sat, 22 Jan 2011 15:29:30 -0500 Received: from vm-emlprdomr-06.its.yale.edu ([130.132.50.147]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Pgk5Q-0003Uc-5N for 7722@debbugs.gnu.org; Sat, 22 Jan 2011 15:29:28 -0500 Received: from furball (c-71-192-165-84.hsd1.ct.comcast.net [71.192.165.84]) (authenticated bits=0) by vm-emlprdomr-06.its.yale.edu (8.14.4/8.14.4) with ESMTP id p0MKbPHP027994 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sat, 22 Jan 2011 15:37:25 -0500 Received: by furball (Postfix, from userid 1000) id 3B1F71611FB; Sat, 22 Jan 2011 15:37:24 -0500 (EST) From: Chong Yidong To: Alan Mackenzie Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop References: <87fwtnbmmj.fsf@member.fsf.org> Date: Sat, 22 Jan 2011 15:37:24 -0500 In-Reply-To: <87fwtnbmmj.fsf@member.fsf.org> (Tassilo Horn's message of "Fri, 24 Dec 2010 09:28:36 +0100") Message-ID: <87hbd0y8sb.fsf@stupidchicken.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" X-Scanned-By: MIMEDefang 2.71 on 130.132.50.147 X-Spam-Score: -2.7 (--) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -2.7 (--) --=-=-= Content-Type: text/plain Tassilo Horn writes: > Orininally reported by Caligo > > He uses GNU Emacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1), > but the bug in still in the current bzr trunk. > > 1. emacs -Q bug.hpp > 2. emacs loops infinitely using 100% CPU resources > > The offending file is that (according to the original reporter, the > spaces and empty lines are needed): I can reproduce this (file attached for convenience). Alan, could you take a look? Looks like a loop in c-forward-<>-arglist-recur: Lisp Backtrace: "c-forward-<>-arglist-recur" (0xffff4528) "c-forward-<>-arglist-recur" (0xffff4708) "c-forward-<>-arglist-recur" (0xffff48e8) "c-forward-<>-arglist-recur" (0xffff4ac8) "c-forward-<>-arglist-recur" (0xffff4ca8) "c-forward-<>-arglist-recur" (0xffff4e88) "c-forward-<>-arglist-recur" (0xffff5068) "c-forward-<>-arglist-recur" (0xffff5248) "c-forward-<>-arglist-recur" (0xffff5428) "c-forward-<>-arglist-recur" (0xffff5608) "c-forward-<>-arglist-recur" (0xffff57e8) "c-forward-<>-arglist-recur" (0xffff59c8) "c-forward-<>-arglist-recur" (0xffff5ba8) "c-forward-<>-arglist-recur" (0xffff5d88) "byte-code" (0xffff5e60) "c-forward-<>-arglist" (0xffff6208) ---Type to continue, or q to quit--- "c-forward-name" (0xffff63e8) "c-forward-type" (0xffff65c8) "c-forward-decl-or-cast-1" (0xffff67f8) 0xee3c20 PVEC_COMPILED "c-find-decl-spots" (0xffff6bb8) "c-font-lock-declarations" (0xffff6dd8) "font-lock-fontify-keywords-region" (0xffff6fc8) "font-lock-default-fontify-region" (0xffff7198) "font-lock-fontify-region" (0xffff7440) "run-hook-with-args" (0xffff7438) "byte-code" (0xffff7520) "jit-lock-fontify-now" (0xffff7938) "jit-lock-function" (0xffff7cc8) --=-=-= Content-Type: text/x-c++hdr Content-Disposition: inline; filename=bug.hpp class ConversionConsole : public QWidget{ private: typedef boost::array InputLines; typedef cons > > > > > > > > > > > > > > > > > > > > > ColorSpaces; }; --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Wed Jan 26 19:47:15 2011 Received: (at 7722) by debbugs.gnu.org; 27 Jan 2011 00:47:15 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PiG15-0004qp-2Z for submit@debbugs.gnu.org; Wed, 26 Jan 2011 19:47:15 -0500 Received: from vm-emlprdomr-05.its.yale.edu ([130.132.50.146]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PiG13-0004qU-Hd for 7722@debbugs.gnu.org; Wed, 26 Jan 2011 19:47:13 -0500 Received: from furball (dhcp128036014126.central.yale.edu [128.36.14.126]) (authenticated bits=0) by vm-emlprdomr-05.its.yale.edu (8.14.4/8.14.4) with ESMTP id p0R0tJfb011410 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 26 Jan 2011 19:55:21 -0500 Received: by furball (Postfix, from userid 1000) id 1F92C160023; Wed, 26 Jan 2011 19:55:16 -0500 (EST) From: Chong Yidong To: Alan Mackenzie Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> Date: Wed, 26 Jan 2011 19:55:15 -0500 In-Reply-To: <87hbd0y8sb.fsf@stupidchicken.com> (Chong Yidong's message of "Sat, 22 Jan 2011 15:37:24 -0500") Message-ID: <87k4hrcgi4.fsf@stupidchicken.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.71 on 130.132.50.146 X-Spam-Score: -2.7 (--) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -2.7 (--) Chong Yidong writes: >> 1. emacs -Q bug.hpp >> 2. emacs loops infinitely using 100% CPU resources >> >> The offending file is that (according to the original reporter, the >> spaces and empty lines are needed): > > I can reproduce this (file attached for convenience). Alan, could you > take a look? Looks like a loop in c-forward-<>-arglist-recur: In the meantime, I have added the following hack/workaround to the emacs-23 branch, which seems to break the loop. Let me know if you find a fix that's safer (since we are well into the 23.3 pretest). *** lisp/progmodes/cc-engine.el 2011-01-02 23:50:46 +0000 --- lisp/progmodes/cc-engine.el 2011-01-27 00:49:22 +0000 *************** *** 4393,4398 **** --- 4393,4400 ---- (goto-char safe-pos) t))) + (defvar c-forward-<>-arglist-recur-depth) + (defun c-forward-<>-arglist (all-types) ;; The point is assumed to be at a "<". Try to treat it as the open ;; paren of an angle bracket arglist and move forward to the *************** *** 4418,4424 **** ;; If `c-record-type-identifiers' is set then activate ;; recording of any found types that constitute an argument in ;; the arglist. ! (c-record-found-types (if c-record-type-identifiers t))) (if (catch 'angle-bracket-arglist-escape (setq c-record-found-types (c-forward-<>-arglist-recur all-types))) --- 4420,4427 ---- ;; If `c-record-type-identifiers' is set then activate ;; recording of any found types that constitute an argument in ;; the arglist. ! (c-record-found-types (if c-record-type-identifiers t)) ! (c-forward-<>-arglist-recur--depth 0)) (if (catch 'angle-bracket-arglist-escape (setq c-record-found-types (c-forward-<>-arglist-recur all-types))) *************** *** 4434,4439 **** --- 4437,4450 ---- nil))) (defun c-forward-<>-arglist-recur (all-types) + + ;; Temporary workaround for Bug#7722. + (when (boundp 'c-forward-<>-arglist-recur--depth) + (if (> c-forward-<>-arglist-recur--depth 100) + (error "Max recursion depth reached in <> arglist") + (setq c-forward-<>-arglist-recur--depth + (1+ c-forward-<>-arglist-recur--depth)))) + ;; Recursive part of `c-forward-<>-arglist'. ;; ;; This function might do hidden buffer changes. From debbugs-submit-bounces@debbugs.gnu.org Sun Jan 30 16:15:42 2011 Received: (at submit) by debbugs.gnu.org; 30 Jan 2011 21:15:42 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PjecX-00061W-Ou for submit@debbugs.gnu.org; Sun, 30 Jan 2011 16:15:42 -0500 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PjecV-00061L-NW for submit@debbugs.gnu.org; Sun, 30 Jan 2011 16:15:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PjekX-0002mO-ML for submit@debbugs.gnu.org; Sun, 30 Jan 2011 16:23:58 -0500 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_RP_MATCHES_RCVD, T_TO_NO_BRKTS_FREEMAIL autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([199.232.76.165]:38179) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PjekX-0002mI-KO for submit@debbugs.gnu.org; Sun, 30 Jan 2011 16:23:57 -0500 Received: from [140.186.70.92] (port=60925 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PjekW-0005mG-He for bug-gnu-emacs@gnu.org; Sun, 30 Jan 2011 16:23:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PjekV-0002le-89 for bug-gnu-emacs@gnu.org; Sun, 30 Jan 2011 16:23:56 -0500 Received: from lo.gmane.org ([80.91.229.12]:38050) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PjekU-0002lR-U2 for bug-gnu-emacs@gnu.org; Sun, 30 Jan 2011 16:23:55 -0500 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PjekS-0002iw-Ag for bug-gnu-emacs@gnu.org; Sun, 30 Jan 2011 22:23:52 +0100 Received: from c-67-183-23-114.hsd1.wa.comcast.net ([67.183.23.114]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 30 Jan 2011 22:23:52 +0100 Received: from dan.colascione by c-67-183-23-114.hsd1.wa.comcast.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 30 Jan 2011 22:23:52 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: bug-gnu-emacs@gnu.org From: Daniel Colascione Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop Date: Sun, 30 Jan 2011 13:23:35 -0800 Lines: 27 Message-ID: <4D45D6D7.1000504@gmail.com> References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> <87k4hrcgi4.fsf@stupidchicken.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: c-67-183-23-114.hsd1.wa.comcast.net User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 In-Reply-To: <87k4hrcgi4.fsf@stupidchicken.com> X-Enigmail-Version: 1.1.1 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 80.91.229.12 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 199.232.76.165 X-Spam-Score: -5.4 (-----) X-Debbugs-Envelope-To: submit Cc: 7722@debbugs.gnu.org, Alan Mackenzie , Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -5.5 (-----) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 1/26/11 4:55 PM, Chong Yidong wrote: > Chong Yidong writes: > >>> 1. emacs -Q bug.hpp >>> 2. emacs loops infinitely using 100% CPU resources >>> >>> The offending file is that (according to the original reporter, the >>> spaces and empty lines are needed): >> >> I can reproduce this (file attached for convenience). Alan, could you >> take a look? Looks like a loop in c-forward-<>-arglist-recur: > > In the meantime, I have added the following hack/workaround to the > emacs-23 branch, which seems to break the loop. Let me know if you find > a fix that's safer (since we are well into the 23.3 pretest). Incidentally, I can't reproduce the problem with the trunk cc-mode. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (Darwin) iEYEARECAAYFAk1F1soACgkQ17c2LVA10VvtFACgi2KuRCq9m15aDx44xGtVTYGB Z3AAnjuVGnWv1P6gz4vItI5HOoSiVcMw =Emh5 -----END PGP SIGNATURE----- From debbugs-submit-bounces@debbugs.gnu.org Fri Feb 04 16:57:58 2011 Received: (at 7722) by debbugs.gnu.org; 4 Feb 2011 21:57:58 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PlTfB-0007U3-IR for submit@debbugs.gnu.org; Fri, 04 Feb 2011 16:57:57 -0500 Received: from colin.muc.de ([193.149.48.1] helo=mail.muc.de) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PlTf8-0007Tr-Qg for 7722@debbugs.gnu.org; Fri, 04 Feb 2011 16:57:56 -0500 Received: (qmail 98766 invoked by uid 3782); 4 Feb 2011 22:06:26 -0000 Received: from acm.muc.de (pD9E5293C.dip.t-dialin.net [217.229.41.60]) by colin2.muc.de (tmda-ofmipd) with ESMTP; Fri, 04 Feb 2011 23:06:24 +0100 Received: (qmail 4323 invoked by uid 1000); 4 Feb 2011 22:22:07 -0000 Date: Fri, 4 Feb 2011 22:22:07 +0000 To: Chong Yidong Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop Message-ID: <20110204222207.GA2424@muc.de> References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87hbd0y8sb.fsf@stupidchicken.com> User-Agent: Mutt/1.5.9i X-Delivery-Agent: TMDA/1.1.5 (Fettercairn) From: Alan Mackenzie X-Primary-Address: acm@muc.de X-Spam-Score: -2.5 (--) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -2.5 (--) Hi there, Yidong, Tassilo, On Sat, Jan 22, 2011 at 03:37:24PM -0500, Chong Yidong wrote: > Tassilo Horn writes: > > Originally reported by Caligo > > He uses GNU Emacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1), > > but the bug in still in the current bzr trunk. > > 1. emacs -Q bug.hpp > > 2. emacs loops infinitely using 100% CPU resources > > The offending file is that (according to the original reporter, the > > spaces and empty lines are needed): > I can reproduce this (file attached for convenience). Alan, could you > take a look? Looks like a loop in c-forward-<>-arglist-recur: It was indeed such a loop. It was caused by a 500n jit-lock boundary falling in the middle of a template construct, hence the "necessity" of all the whitespace to reproduce the failure. Here's a putative patch for the problem. I've refactored the offending function by replacing obscenely nested `if'-forms with a simple `cond'. I've also removed some narrowing (to the 500n limit) which should help jit-lock, hopefully without hurting too much elsewhere. Tassilo, would you try out the patch, please, and let me know how it goes. Thanks! === modified file 'lisp/progmodes/cc-engine.el' *** lisp/progmodes/cc-engine.el 2011-01-31 23:54:50 +0000 --- lisp/progmodes/cc-engine.el 2011-02-04 22:12:46 +0000 *************** *** 5455,5463 **** (goto-char start) nil)) ! (forward-char) (unless (looking-at c-<-op-cont-regexp) (while (and (progn (c-forward-syntactic-ws) --- 5455,5465 ---- (goto-char start) nil)) ! (forward-char) ; Forward over the opening '<'. (unless (looking-at c-<-op-cont-regexp) + ;; go forward one non-alphanumeric character (group) per iteration of + ;; this loop. (while (and (progn (c-forward-syntactic-ws) *************** *** 5486,5492 **** (c-forward-type) (c-forward-syntactic-ws)))))) ! (setq pos (point)) ;; Note: These regexps exploit the match order in \| so ;; that "<>" is matched by "<" rather than "[^>:-]>". --- 5488,5494 ---- (c-forward-type) (c-forward-syntactic-ws)))))) ! (setq pos (point)) ; e.g. first token inside the '<' ;; Note: These regexps exploit the match order in \| so ;; that "<>" is matched by "<" rather than "[^>:-]>". *************** *** 5522,5559 **** ;; Either an operator starting with '<' or a nested arglist. (setq pos (point)) (let (id-start id-end subres keyword-match) ! (if (if (looking-at c-<-op-cont-regexp) ! (setq tmp (match-end 0)) ! (setq tmp pos) ! (backward-char) ! (not ! (and ! ! (save-excursion ! ;; There's always an identifier before an angle ! ;; bracket arglist, or a keyword in ! ;; `c-<>-type-kwds' or `c-<>-arglist-kwds'. ! (c-backward-syntactic-ws) ! (setq id-end (point)) ! (c-simple-skip-symbol-backward) ! (when (or (setq keyword-match ! (looking-at c-opt-<>-sexp-key)) ! (not (looking-at c-keywords-regexp))) ! (setq id-start (point)))) ! ! (setq subres ! (let ((c-promote-possible-types t) ! (c-record-found-types t)) ! (c-forward-<>-arglist-recur ! (and keyword-match ! (c-keyword-member ! (c-keyword-sym (match-string 1)) ! 'c-<>-type-kwds))))) ! ))) ! ! ;; It was not an angle bracket arglist. ! (goto-char tmp) ! ;; It was an angle bracket arglist. (setq c-record-found-types subres) --- 5524,5558 ---- ;; Either an operator starting with '<' or a nested arglist. (setq pos (point)) (let (id-start id-end subres keyword-match) ! (cond ! ;; The '<' begins a multi-char operator. ! ((looking-at c-<-op-cont-regexp) ! (setq tmp (match-end 0)) ! (goto-char (match-end 0))) ! ;; We're at a nested <.....> ! ((progn ! (setq tmp pos) ! (backward-char) ; to the '<' ! (and ! (save-excursion ! ;; There's always an identifier before an angle ! ;; bracket arglist, or a keyword in `c-<>-type-kwds' ! ;; or `c-<>-arglist-kwds'. ! (c-backward-syntactic-ws) ! (setq id-end (point)) ! (c-simple-skip-symbol-backward) ! (when (or (setq keyword-match ! (looking-at c-opt-<>-sexp-key)) ! (not (looking-at c-keywords-regexp))) ! (setq id-start (point)))) ! (setq subres ! (let ((c-promote-possible-types t) ! (c-record-found-types t)) ! (c-forward-<>-arglist-recur ! (and keyword-match ! (c-keyword-member ! (c-keyword-sym (match-string 1)) ! 'c-<>-type-kwds))))))) ;; It was an angle bracket arglist. (setq c-record-found-types subres) *************** *** 5567,5574 **** (c-forward-syntactic-ws) (looking-at c-opt-identifier-concat-key))) (c-record-ref-id (cons id-start id-end)) ! (c-record-type-id (cons id-start id-end)))))) ! t) ((and (not c-restricted-<>-arglists) (or (and (eq (char-before) ?&) --- 5566,5578 ---- (c-forward-syntactic-ws) (looking-at c-opt-identifier-concat-key))) (c-record-ref-id (cons id-start id-end)) ! (c-record-type-id (cons id-start id-end))))) ! ! ;; At a "less than" operator. ! (t ! (forward-char) ! ))) ! t) ; carry on looping. ((and (not c-restricted-<>-arglists) (or (and (eq (char-before) ?&) === modified file 'lisp/progmodes/cc-fonts.el' *** lisp/progmodes/cc-fonts.el 2011-01-25 04:08:28 +0000 --- lisp/progmodes/cc-fonts.el 2011-02-04 22:10:01 +0000 *************** *** 1082,1088 **** (boundp 'parse-sexp-lookup-properties)))) ;; Below we fontify a whole declaration even when it crosses the limit, ! ;; to avoid gaps when lazy-lock fontifies the file a screenful at a ;; time. That is however annoying during editing, e.g. the following is ;; a common situation while the first line is being written: ;; --- 1082,1088 ---- (boundp 'parse-sexp-lookup-properties)))) ;; Below we fontify a whole declaration even when it crosses the limit, ! ;; to avoid gaps when jit/lazy-lock fontifies the file a block at a ;; time. That is however annoying during editing, e.g. the following is ;; a common situation while the first line is being written: ;; *************** *** 1094,1102 **** ;; "some_other_variable" as an identifier, and the latter will not ;; correct itself until the second line is changed. To avoid that we ;; narrow to the limit if the region to fontify is a single line. ! (narrow-to-region ! (point-min) ! (if (<= limit (c-point 'bonl)) (save-excursion ;; Narrow after any operator chars following the limit though, ;; since those characters can be useful in recognizing a --- 1094,1102 ---- ;; "some_other_variable" as an identifier, and the latter will not ;; correct itself until the second line is changed. To avoid that we ;; narrow to the limit if the region to fontify is a single line. ! (if (<= limit (c-point 'bonl)) ! (narrow-to-region ! (point-min) (save-excursion ;; Narrow after any operator chars following the limit though, ;; since those characters can be useful in recognizing a *************** *** 1104,1111 **** ;; after the header). (goto-char limit) (skip-chars-forward c-nonsymbol-chars) ! (point)) ! limit)) (c-find-decl-spots limit --- 1104,1110 ---- ;; after the header). (goto-char limit) (skip-chars-forward c-nonsymbol-chars) ! (point)))) (c-find-decl-spots limit -- Alan Mackenzie (Nuremberg, Germany). From debbugs-submit-bounces@debbugs.gnu.org Sun Feb 06 14:11:58 2011 Received: (at 7722) by debbugs.gnu.org; 6 Feb 2011 19:11:58 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PmA1e-00049b-1V for submit@debbugs.gnu.org; Sun, 06 Feb 2011 14:11:58 -0500 Received: from out1.smtp.messagingengine.com ([66.111.4.25]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PmA1b-00049P-Te for 7722@debbugs.gnu.org; Sun, 06 Feb 2011 14:11:56 -0500 Received: from compute3.internal (compute3.nyi.mail.srv.osa [10.202.2.43]) by gateway1.messagingengine.com (Postfix) with ESMTP id 593412085F; Sun, 6 Feb 2011 14:20:32 -0500 (EST) Received: from frontend1.messagingengine.com ([10.202.2.160]) by compute3.internal (MEProxy); Sun, 06 Feb 2011 14:20:32 -0500 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=messagingengine.com; h=from:to:cc:subject:references:date:in-reply-to:message-id:mime-version:content-type; s=smtpout; bh=t37G1XTTMEpFuUdwBEQ3XkjtYzM=; b=tukJypp4YxrZFQJGqsX22ZU9h7okz6MSXOUKQIBTJC8Bk5i+PCMf8YoKyXQEzSN02tfXfUjy3gEsAL1rjudnyWuOc0Sk/hMshGur8x53TXR4Lc/RxX3BeQnrq0p3cDaPe2jb93agwGqG0aQ9nXuRBFVD7lcRIUkvRi5e1WrisVA= X-Sasl-enc: jXiCh+M/1AXmZeu7SfIrKBtTUsW8m8xX06PwCV3QJb78 1297020031 Received: from thinkpad (95-88-32-105-dynip.superkabel.de [95.88.32.105]) by mail.messagingengine.com (Postfix) with ESMTPA id 3DEAB405452; Sun, 6 Feb 2011 14:20:30 -0500 (EST) From: Tassilo Horn To: Alan Mackenzie Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> <20110204222207.GA2424@muc.de> Date: Sun, 06 Feb 2011 20:20:30 +0100 In-Reply-To: <20110204222207.GA2424@muc.de> (Alan Mackenzie's message of "Fri, 4 Feb 2011 22:22:07 +0000") Message-ID: <87pqr56kch.fsf@member.fsf.org> User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/24.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -3.1 (---) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Chong Yidong X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -3.3 (---) Alan Mackenzie writes: Hi Alan, > Here's a putative patch for the problem. I've refactored the > offending function by replacing obscenely nested `if'-forms with a > simple `cond'. I've also removed some narrowing (to the 500n limit) > which should help jit-lock, hopefully without hurting too much > elsewhere. > > Tassilo, would you try out the patch, please, and let me know how it > goes. Thanks! Seems to work fine. I had no problems visiting that bad header file. Bye, Tassilo From debbugs-submit-bounces@debbugs.gnu.org Fri Feb 11 20:16:19 2011 Received: (at 7722) by debbugs.gnu.org; 12 Feb 2011 01:16:20 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Po45z-0006kz-IO for submit@debbugs.gnu.org; Fri, 11 Feb 2011 20:16:19 -0500 Received: from vm-emlprdomr-05.its.yale.edu ([130.132.50.146]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Po45y-0006ko-9q for 7722@debbugs.gnu.org; Fri, 11 Feb 2011 20:16:18 -0500 Received: from furball (dhcp128036014062.central.yale.edu [128.36.14.62]) (authenticated bits=0) by vm-emlprdomr-05.its.yale.edu (8.14.4/8.14.4) with ESMTP id p1C1P8qr017085 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 11 Feb 2011 20:25:08 -0500 Received: by furball (Postfix, from userid 1000) id BCB2016055E; Fri, 11 Feb 2011 20:25:06 -0500 (EST) From: Chong Yidong To: Alan Mackenzie Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> <20110204222207.GA2424@muc.de> Date: Fri, 11 Feb 2011 20:25:06 -0500 In-Reply-To: <20110204222207.GA2424@muc.de> (Alan Mackenzie's message of "Fri, 4 Feb 2011 22:22:07 +0000") Message-ID: <8739nu82od.fsf@stupidchicken.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.71 on 130.132.50.146 X-Spam-Score: -2.7 (--) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -2.7 (--) Alan Mackenzie writes: > It was indeed such a loop. It was caused by a 500n jit-lock boundary > falling in the middle of a template construct, hence the "necessity" of > all the whitespace to reproduce the failure. > > Here's a putative patch for the problem. I've refactored the offending > function by replacing obscenely nested `if'-forms with a simple `cond'. > I've also removed some narrowing (to the 500n limit) which should help > jit-lock, hopefully without hurting too much elsewhere. > > Tassilo, would you try out the patch, please, and let me know how it > goes. Thanks! Thanks. This patch doesn't apply cleanly to the emacs-23 branch. Do you think we could apply it to the trunk, and just use the workaround in the branch (some of these logic changes don't look obvious to me)? From debbugs-submit-bounces@debbugs.gnu.org Sun Feb 13 06:56:01 2011 Received: (at 7722) by debbugs.gnu.org; 13 Feb 2011 11:56:01 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PoaYa-0008FV-CU for submit@debbugs.gnu.org; Sun, 13 Feb 2011 06:56:00 -0500 Received: from colin.muc.de ([193.149.48.1] helo=mail.muc.de) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PoaYX-0008FI-4j for 7722@debbugs.gnu.org; Sun, 13 Feb 2011 06:55:58 -0500 Received: (qmail 7003 invoked by uid 3782); 13 Feb 2011 12:04:50 -0000 Received: from acm.muc.de (pD9E53CC3.dip.t-dialin.net [217.229.60.195]) by colin2.muc.de (tmda-ofmipd) with ESMTP; Sun, 13 Feb 2011 13:04:48 +0100 Received: (qmail 4317 invoked by uid 1000); 13 Feb 2011 12:20:44 -0000 Date: Sun, 13 Feb 2011 12:20:44 +0000 To: Chong Yidong Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop Message-ID: <20110213122044.GB2078@muc.de> References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> <20110204222207.GA2424@muc.de> <8739nu82od.fsf@stupidchicken.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8739nu82od.fsf@stupidchicken.com> User-Agent: Mutt/1.5.9i X-Delivery-Agent: TMDA/1.1.5 (Fettercairn) From: Alan Mackenzie X-Primary-Address: acm@muc.de X-Spam-Score: -2.5 (--) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -2.5 (--) Hi, Yidong! On Fri, Feb 11, 2011 at 08:25:06PM -0500, Chong Yidong wrote: > Alan Mackenzie writes: > > It was indeed such a loop. It was caused by a 500n jit-lock boundary > > falling in the middle of a template construct, hence the "necessity" of > > all the whitespace to reproduce the failure. > > Here's a putative patch for the problem. I've refactored the offending > > function by replacing obscenely nested `if'-forms with a simple `cond'. > > I've also removed some narrowing (to the 500n limit) which should help > > jit-lock, hopefully without hurting too much elsewhere. > > Tassilo, would you try out the patch, please, and let me know how it > > goes. Thanks! > Thanks. This patch doesn't apply cleanly to the emacs-23 branch. That surprises me. Would you like me to rework the patch so that it does? > Do you think we could apply it to the trunk, and just use the > workaround in the branch .... To be honest, I haven't really looked at the workaround. I suppose it would be OK. However, the patched version passed all the CC Mode regression tests (which are about half indentation, half font-locking), so I'm fairly confident about it. > .... (some of these logic changes don't look obvious to me)? One of the fixes was removing a `narrow-to-region' around the region being fontified. In a jit-lock 500-byte chunk, this had the effect of cutting necessary context off the end. The other change was basically to refactor, in which the infinite looping disappeared in the wash. Although I could get edebug going on this loop, the source was just too complicated to be worthwhile trying to understand in detail. (Believe me, I tried. :-) Incidentally, I'm not getting mail from emacs-devel or bug-gnu-emacs at the moment, and I've not got enough energy to do anything about it. Do you know anything specific which might be doing this to me? -- Alan Mackenzie (Nuremberg, Germany). From debbugs-submit-bounces@debbugs.gnu.org Sun Feb 13 15:32:52 2011 Received: (at 7722) by debbugs.gnu.org; 13 Feb 2011 20:32:52 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Poicl-0004w2-V2 for submit@debbugs.gnu.org; Sun, 13 Feb 2011 15:32:52 -0500 Received: from fencepost.gnu.org ([140.186.70.10]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Poick-0004vp-92 for 7722@debbugs.gnu.org; Sun, 13 Feb 2011 15:32:50 -0500 Received: from cyd by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1PoilN-0001Eo-BA; Sun, 13 Feb 2011 15:41:45 -0500 From: Chong Yidong To: Alan Mackenzie Subject: Re: bug#7722: 24.0.50; Finding this C++ header file drops emacs into a infinite loop References: <87fwtnbmmj.fsf@member.fsf.org> <87hbd0y8sb.fsf@stupidchicken.com> <20110204222207.GA2424@muc.de> <8739nu82od.fsf@stupidchicken.com> <20110213122044.GB2078@muc.de> Date: Sun, 13 Feb 2011 15:41:45 -0500 In-Reply-To: <20110213122044.GB2078@muc.de> (Alan Mackenzie's message of "Sun, 13 Feb 2011 12:20:44 +0000") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Spam-Score: -6.6 (------) X-Debbugs-Envelope-To: 7722 Cc: 7722@debbugs.gnu.org, Tassilo Horn X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -6.6 (------) Alan Mackenzie writes: >> Thanks. This patch doesn't apply cleanly to the emacs-23 branch. > > That surprises me. Would you like me to rework the patch so that it > does? I took a stab at it, but I'm not familiar enough with the code to do the job. Here's an example of a mismatch. In your patch, you have: *************** *** 5486,5492 **** (c-forward-type) (c-forward-syntactic-ws)))))) ! (setq pos (point)) ;; Note: These regexps exploit the match order in \| so ;; that "<>" is matched by "<" rather than "[^>:-]>". --- 5488,5494 ---- (c-forward-type) (c-forward-syntactic-ws)))))) ! (setq pos (point)) ; e.g. first token inside the '<' ;; Note: These regexps exploit the match order in \| so ;; that "<>" is matched by "<" rather than "[^>:-]>". but in the branch, the relevant part of the code looks like this: ;; Must check for '>' at the very start separately, ;; since the regexp below has to avoid ">>" without ;; using \\=. (forward-char) t) ;; Note: These regexps exploit the match order in \| so ;; that "<>" is matched by "<" rather than "[^>:-]>". This code was altered during Nathaniel Flath's changes for Java 5 support, back in July, which was (rightly) not committed to the branch: revno: 100951 committer: Alan Mackenzie branch nick: trunk timestamp: Sat 2010-07-31 20:01:08 +0000 message: Enhance Java Mode to handle Java 5.0 (Tiger) and Java 6 (Mustang). Contributed by Nathaniel Flath. Any suggestions? :-/ From debbugs-submit-bounces@debbugs.gnu.org Wed Jun 29 17:14:37 2011 Received: (at control) by debbugs.gnu.org; 29 Jun 2011 21:14:37 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Qc25l-0008TZ-7T for submit@debbugs.gnu.org; Wed, 29 Jun 2011 17:14:37 -0400 Received: from fencepost.gnu.org ([140.186.70.10]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Qc25g-0008TK-2o for control@debbugs.gnu.org; Wed, 29 Jun 2011 17:14:36 -0400 Received: from rgm by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1Qc25a-0004YJ-Ht for control@debbugs.gnu.org; Wed, 29 Jun 2011 17:14:26 -0400 Date: Wed, 29 Jun 2011 17:14:26 -0400 Message-Id: Subject: control message for bug 7722 To: X-Mailer: mail (GNU Mailutils 2.1) From: Glenn Morris X-Spam-Score: -6.4 (------) X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: debbugs-submit-bounces@debbugs.gnu.org Errors-To: debbugs-submit-bounces@debbugs.gnu.org X-Spam-Score: -6.4 (------) close 7722 24.1 From unknown Thu Aug 14 21:50:02 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Thu, 28 Jul 2011 11:24:03 +0000 User-Agent: Fakemail v42.6.9 # This is a fake control message. # # The action: # bug archived. thanks # This fakemail brought to you by your local debbugs # administrator