From unknown Mon Jun 23 20:16:23 2025 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) Content-Type: text/plain; charset=utf-8 From: bug#8218 <8218@debbugs.gnu.org> To: bug#8218 <8218@debbugs.gnu.org> Subject: Status: 23.2; scan-sexps sees inconsistent syntax Reply-To: bug#8218 <8218@debbugs.gnu.org> Date: Tue, 24 Jun 2025 03:16:23 +0000 retitle 8218 23.2; scan-sexps sees inconsistent syntax reassign 8218 emacs submitter 8218 Dima Kogan severity 8218 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Thu Mar 10 04:23:26 2011 Received: (at submit) by debbugs.gnu.org; 10 Mar 2011 09:23:26 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Pxc5d-0001fy-3F for submit@debbugs.gnu.org; Thu, 10 Mar 2011 04:23:26 -0500 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Pxc5a-0001fj-8K for submit@debbugs.gnu.org; Thu, 10 Mar 2011 04:23:23 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Pxc5S-0006Rg-1N for submit@debbugs.gnu.org; Thu, 10 Mar 2011 04:23:17 -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,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([199.232.76.165]:39170) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Pxc5R-0006RY-Nr for submit@debbugs.gnu.org; Thu, 10 Mar 2011 04:23:14 -0500 Received: from [140.186.70.92] (port=39511 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Pxc5O-0000Ax-8V for bug-gnu-emacs@gnu.org; Thu, 10 Mar 2011 04:23:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Pxc5L-0006QO-GR for bug-gnu-emacs@gnu.org; Thu, 10 Mar 2011 04:23:09 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123]:56396) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Pxc5L-0006Px-DZ for bug-gnu-emacs@gnu.org; Thu, 10 Mar 2011 04:23:07 -0500 X-Authority-Analysis: v=1.1 cv=UQuFHoD2CPQ248x8AXEbKhr4z9AaDqApxmEl3BhfZ64= c=1 sm=0 a=zUGN1PMOEbIA:10 a=syinx_Tw3_MA:10 a=8YMtuzaJ5FE3wtSInqJrPg==:17 a=aR16PxjQAAAA:8 a=g2aHausLCvAzyjvi2lYA:9 a=pCAF1DTKUuBFw31dAJoA:7 a=LzW3KpjMcoUa2WcpdH5JI51peCEA:4 a=CiSHi91Bn78A:10 a=8YMtuzaJ5FE3wtSInqJrPg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 76.175.234.46 Received: from [76.175.234.46] ([76.175.234.46:58941] helo=smart) by hrndva-oedge02.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 1A/38-00963-878987D4; Thu, 10 Mar 2011 09:23:04 +0000 Received: from dkogan by smart with local (Exim 4.74) (envelope-from ) id 1Pxc5H-00022C-Da for bug-gnu-emacs@gnu.org; Thu, 10 Mar 2011 01:23:03 -0800 From: Dima Kogan To: bug-gnu-emacs@gnu.org Subject: 23.2; scan-sexps sees inconsistent syntax Message-Id: Date: Thu, 10 Mar 2011 01:23:03 -0800 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. 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 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 (-----) <#part type="text/x-perl" filename="/tmp/tst3.pm" disposition=inline description="bug demo"> <#/part> I am seeing (scan-sexps) show inconsistent behavior depending on WHEN it is evaluated. If the attached sample file is opened, the point placed at the first '{', and (scan-sexps (point) 1) evaluated, the returned position is at times of the first '}' (wrong) and at other times of the second '}' (right). If the evaluation is done right when the file is opened, I observe the wrong behavior. This is reliably triggered with $ emacs -Q /tmp/tst3.pm --eval '(goto-char (scan-sexps 5 1))' Any subsequent evaluation of the same form in that buffer produces the correct behavior. If I turn off font-lock-mode, I consistently get incorrect behavior. This has wide ramifications with occasional incorrect indentation and hide-show operation, for instance. I looked through the source a bit, and I see an inconsistency in the syntax code returned by the code = SYNTAX_WITH_MULTIBYTE_CHECK (c) line in scan_lists() in syntax.c . When things work, the '$' is interpreted as punctuation and the following '{' as a block-open. When things don't work, the '$' is a quote and the '{' is skipped altogether: | character | incorrect syntax | correct syntax | |-----------+------------------+----------------| | = | Spunct | Spunct | | | Swhitespace | Swhitespace | | $ | Scharquote | Spunct | | { | | Sopen | | P | Sword | Sword | syntax.c is a bit difficult to dive into, but it would be great if someone who has experience with it would take a look. In GNU Emacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1) of 2010-12-11 on brahms, modified by Debian Windowing system distributor `The X.Org Foundation', version 11.0.10707000 configured using `configure '--build' 'x86_64-linux-gnu' '--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/emacs23:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.2/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' '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: Perl Minor modes in effect: tooltip-mode: t mouse-wheel-mode: t tool-bar-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-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent input: M-: M-x r e p o r t SPC b u g s c a a n - s e x p s SPC g e n e r a t e s SPC i n c o n s i s t e n t SPC s y n t a x C-SPC M-w C-g C-g C-g M-: ( p o i n t ) M-x C-g M-x Recent messages: Loading /etc/emacs/site-start.d/50psvn.el (source)...done Loading /etc/emacs23/site-start.d/50vm-init.el (source)...done Loading /etc/emacs/site-start.d/50w3m-el.el (source)...done Loading /etc/emacs/site-start.d/51semi.el (source)...done Loading /etc/emacs/site-start.d/51speedbar.el (source)...done Loading /etc/emacs/site-start.d/65wl-beta.el (source)...done For information about GNU Emacs and the GNU system, type C-h C-a. 212 (#o324, #xd4) Quit [3 times] 92 (#o134, #x5c) Quit Load-path shadows: /usr/share/emacs/23.2/site-lisp/auctex/tex-bar hides /usr/share/emacs/site-lisp/auctex/tex-bar /usr/share/emacs/23.2/site-lisp/auctex/context-nl hides /usr/share/emacs/site-lisp/auctex/context-nl /usr/share/emacs/23.2/site-lisp/auctex/tex-buf hides /usr/share/emacs/site-lisp/auctex/tex-buf /usr/share/emacs/23.2/site-lisp/auctex/texmathp hides /usr/share/emacs/site-lisp/auctex/texmathp /usr/share/emacs/23.2/site-lisp/auctex/tex hides /usr/share/emacs/site-lisp/auctex/tex /usr/share/emacs/23.2/site-lisp/auctex/tex-mik hides /usr/share/emacs/site-lisp/auctex/tex-mik /usr/share/emacs/23.2/site-lisp/auctex/tex-fptex hides /usr/share/emacs/site-lisp/auctex/tex-fptex /usr/share/emacs/23.2/site-lisp/auctex/bib-cite hides /usr/share/emacs/site-lisp/auctex/bib-cite /usr/share/emacs/23.2/site-lisp/auctex/tex-info hides /usr/share/emacs/site-lisp/auctex/tex-info /usr/share/emacs/23.2/site-lisp/auctex/tex-jp hides /usr/share/emacs/site-lisp/auctex/tex-jp /usr/share/emacs/23.2/site-lisp/auctex/tex-font hides /usr/share/emacs/site-lisp/auctex/tex-font /usr/share/emacs/23.2/site-lisp/auctex/toolbar-x hides /usr/share/emacs/site-lisp/auctex/toolbar-x /usr/share/emacs/23.2/site-lisp/auctex/latex hides /usr/share/emacs/site-lisp/auctex/latex /usr/share/emacs/23.2/site-lisp/auctex/font-latex hides /usr/share/emacs/site-lisp/auctex/font-latex /usr/share/emacs/23.2/site-lisp/auctex/tex-fold hides /usr/share/emacs/site-lisp/auctex/tex-fold /usr/share/emacs/23.2/site-lisp/auctex/context hides /usr/share/emacs/site-lisp/auctex/context /usr/share/emacs/23.2/site-lisp/auctex/context-en hides /usr/share/emacs/site-lisp/auctex/context-en /usr/share/emacs/23.2/site-lisp/auctex/multi-prompt hides /usr/share/emacs/site-lisp/auctex/multi-prompt /usr/share/emacs/23.2/site-lisp/auctex/tex-style hides /usr/share/emacs/site-lisp/auctex/tex-style /usr/local/share/emacs/site-lisp/imaxima-autoconf-variables hides /usr/share/emacs/23.2/site-lisp/maxima/imaxima-autoconf-variables /usr/local/share/emacs/site-lisp/imaxima hides /usr/share/emacs/23.2/site-lisp/maxima/imaxima /usr/local/share/emacs/site-lisp/imath hides /usr/share/emacs/23.2/site-lisp/maxima/imath /usr/share/emacs/site-lisp/autoconf/autotest-mode hides /usr/share/emacs/site-lisp/autotest-mode /usr/share/emacs/23.2/site-lisp/magit hides /usr/share/emacs/site-lisp/magit /usr/share/emacs/23.2/site-lisp/cscope/xcscope hides /usr/share/emacs/site-lisp/xcscope /usr/share/emacs/23.2/site-lisp/cmake-data/cmake-mode hides /usr/share/emacs/site-lisp/cmake-mode /usr/share/emacs/23.2/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup /usr/share/emacs23/site-lisp/semi/pgg-pgp5 hides /usr/share/emacs/23.2/lisp/pgg-pgp5 /usr/share/emacs23/site-lisp/speedbar/sb-image hides /usr/share/emacs/23.2/lisp/sb-image /usr/share/emacs23/site-lisp/semi/pgg hides /usr/share/emacs/23.2/lisp/pgg /usr/share/emacs23/site-lisp/semi/pgg-parse hides /usr/share/emacs/23.2/lisp/pgg-parse /usr/share/emacs23/site-lisp/cedet-common/ezimage hides /usr/share/emacs/23.2/lisp/ezimage /usr/share/emacs23/site-lisp/flim/md4 hides /usr/share/emacs/23.2/lisp/md4 /usr/share/emacs23/site-lisp/semi/pgg-gpg hides /usr/share/emacs/23.2/lisp/pgg-gpg /usr/share/emacs23/site-lisp/speedbar/speedbar hides /usr/share/emacs/23.2/lisp/speedbar /usr/share/emacs23/site-lisp/flim/sha1 hides /usr/share/emacs/23.2/lisp/sha1 /usr/share/emacs23/site-lisp/semi/pgg-pgp hides /usr/share/emacs/23.2/lisp/pgg-pgp /usr/share/emacs23/site-lisp/flim/hex-util hides /usr/share/emacs/23.2/lisp/hex-util /usr/share/emacs23/site-lisp/speedbar/dframe hides /usr/share/emacs/23.2/lisp/dframe /usr/share/emacs23/site-lisp/semi/pgg-def hides /usr/share/emacs/23.2/lisp/pgg-def /usr/share/emacs23/site-lisp/dictionaries-common/flyspell hides /usr/share/emacs/23.2/lisp/textmodes/flyspell /usr/share/emacs23/site-lisp/dictionaries-common/ispell hides /usr/share/emacs/23.2/lisp/textmodes/ispell /usr/share/emacs/23.2/site-lisp/octave3.1-emacsen/octave-inf hides /usr/share/emacs/23.2/lisp/progmodes/octave-inf /usr/share/emacs/23.2/site-lisp/octave3.1-emacsen/octave-mod hides /usr/share/emacs/23.2/lisp/progmodes/octave-mod /usr/share/emacs23/site-lisp/org-mode/org-archive hides /usr/share/emacs/23.2/lisp/org/org-archive /usr/share/emacs23/site-lisp/org-mode/org-mobile hides /usr/share/emacs/23.2/lisp/org/org-mobile /usr/share/emacs23/site-lisp/org-mode/org-ascii hides /usr/share/emacs/23.2/lisp/org/org-ascii /usr/share/emacs23/site-lisp/org-mode/org-clock hides /usr/share/emacs/23.2/lisp/org/org-clock /usr/share/emacs23/site-lisp/org-mode/org-gnus hides /usr/share/emacs/23.2/lisp/org/org-gnus /usr/share/emacs23/site-lisp/org-mode/org-indent hides /usr/share/emacs/23.2/lisp/org/org-indent /usr/share/emacs23/site-lisp/org-mode/org-wl hides /usr/share/emacs/23.2/lisp/org/org-wl /usr/share/emacs23/site-lisp/org-mode/org-exp-blocks hides /usr/share/emacs/23.2/lisp/org/org-exp-blocks /usr/share/emacs23/site-lisp/org-mode/org-list hides /usr/share/emacs/23.2/lisp/org/org-list /usr/share/emacs23/site-lisp/org-mode/org-w3m hides /usr/share/emacs/23.2/lisp/org/org-w3m /usr/share/emacs23/site-lisp/org-mode/org-colview hides /usr/share/emacs/23.2/lisp/org/org-colview /usr/share/emacs23/site-lisp/org-mode/org-freemind hides /usr/share/emacs/23.2/lisp/org/org-freemind /usr/share/emacs23/site-lisp/org-mode/org-macs hides /usr/share/emacs/23.2/lisp/org/org-macs /usr/share/emacs23/site-lisp/org-mode/org-crypt hides /usr/share/emacs/23.2/lisp/org/org-crypt /usr/share/emacs23/site-lisp/org-mode/org-mhe hides /usr/share/emacs/23.2/lisp/org/org-mhe /usr/share/emacs23/site-lisp/org-mode/org-table hides /usr/share/emacs/23.2/lisp/org/org-table /usr/share/emacs23/site-lisp/org-mode/org hides /usr/share/emacs/23.2/lisp/org/org /usr/share/emacs23/site-lisp/org-mode/org-bibtex hides /usr/share/emacs/23.2/lisp/org/org-bibtex /usr/share/emacs23/site-lisp/org-mode/org-src hides /usr/share/emacs/23.2/lisp/org/org-src /usr/share/emacs23/site-lisp/org-mode/org-compat hides /usr/share/emacs/23.2/lisp/org/org-compat /usr/share/emacs23/site-lisp/org-mode/org-publish hides /usr/share/emacs/23.2/lisp/org/org-publish /usr/share/emacs23/site-lisp/org-mode/org-id hides /usr/share/emacs/23.2/lisp/org/org-id /usr/share/emacs23/site-lisp/org-mode/org-feed hides /usr/share/emacs/23.2/lisp/org/org-feed /usr/share/emacs23/site-lisp/org-mode/org-habit hides /usr/share/emacs/23.2/lisp/org/org-habit /usr/share/emacs23/site-lisp/org-mode/org-rmail hides /usr/share/emacs/23.2/lisp/org/org-rmail /usr/share/emacs23/site-lisp/org-mode/org-plot hides /usr/share/emacs/23.2/lisp/org/org-plot /usr/share/emacs23/site-lisp/org-mode/org-protocol hides /usr/share/emacs/23.2/lisp/org/org-protocol /usr/share/emacs23/site-lisp/org-mode/org-faces hides /usr/share/emacs/23.2/lisp/org/org-faces /usr/share/emacs23/site-lisp/org-mode/org-latex hides /usr/share/emacs/23.2/lisp/org/org-latex /usr/share/emacs23/site-lisp/org-mode/org-jsinfo hides /usr/share/emacs/23.2/lisp/org/org-jsinfo /usr/share/emacs23/site-lisp/org-mode/org-xoxo hides /usr/share/emacs/23.2/lisp/org/org-xoxo /usr/share/emacs23/site-lisp/org-mode/org-vm hides /usr/share/emacs/23.2/lisp/org/org-vm /usr/share/emacs23/site-lisp/org-mode/org-mouse hides /usr/share/emacs/23.2/lisp/org/org-mouse /usr/share/emacs23/site-lisp/org-mode/org-timer hides /usr/share/emacs/23.2/lisp/org/org-timer /usr/share/emacs23/site-lisp/org-mode/org-footnote hides /usr/share/emacs/23.2/lisp/org/org-footnote /usr/share/emacs23/site-lisp/org-mode/org-html hides /usr/share/emacs/23.2/lisp/org/org-html /usr/share/emacs23/site-lisp/org-mode/org-inlinetask hides /usr/share/emacs/23.2/lisp/org/org-inlinetask /usr/share/emacs23/site-lisp/org-mode/org-attach hides /usr/share/emacs/23.2/lisp/org/org-attach /usr/share/emacs23/site-lisp/org-mode/org-agenda hides /usr/share/emacs/23.2/lisp/org/org-agenda /usr/share/emacs23/site-lisp/org-mode/org-datetree hides /usr/share/emacs/23.2/lisp/org/org-datetree /usr/share/emacs23/site-lisp/org-mode/org-bbdb hides /usr/share/emacs/23.2/lisp/org/org-bbdb /usr/share/emacs23/site-lisp/org-mode/org-irc hides /usr/share/emacs/23.2/lisp/org/org-irc /usr/share/emacs23/site-lisp/org-mode/org-mew hides /usr/share/emacs/23.2/lisp/org/org-mew /usr/share/emacs23/site-lisp/org-mode/org-mac-message hides /usr/share/emacs/23.2/lisp/org/org-mac-message /usr/share/emacs23/site-lisp/org-mode/org-docbook hides /usr/share/emacs/23.2/lisp/org/org-docbook /usr/share/emacs23/site-lisp/org-mode/org-info hides /usr/share/emacs/23.2/lisp/org/org-info /usr/share/emacs23/site-lisp/org-mode/org-exp hides /usr/share/emacs/23.2/lisp/org/org-exp /usr/share/emacs23/site-lisp/org-mode/org-install hides /usr/share/emacs/23.2/lisp/org/org-install /usr/share/emacs23/site-lisp/org-mode/org-icalendar hides /usr/share/emacs/23.2/lisp/org/org-icalendar /usr/share/emacs23/site-lisp/org-mode/org-remember hides /usr/share/emacs/23.2/lisp/org/org-remember /usr/share/emacs23/site-lisp/flim/hmac-def hides /usr/share/emacs/23.2/lisp/net/hmac-def /usr/share/emacs23/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/23.2/lisp/net/sasl-ntlm /usr/share/emacs23/site-lisp/flim/sasl hides /usr/share/emacs/23.2/lisp/net/sasl /usr/share/emacs23/site-lisp/flim/sasl-digest hides /usr/share/emacs/23.2/lisp/net/sasl-digest /usr/share/emacs23/site-lisp/flim/hmac-md5 hides /usr/share/emacs/23.2/lisp/net/hmac-md5 /usr/share/emacs23/site-lisp/flim/ntlm hides /usr/share/emacs/23.2/lisp/net/ntlm /usr/share/emacs23/site-lisp/flim/sasl-cram hides /usr/share/emacs/23.2/lisp/net/sasl-cram /usr/share/emacs23/site-lisp/wl/rfc2368 hides /usr/share/emacs/23.2/lisp/mail/rfc2368 /usr/share/emacs23/site-lisp/cedet-common/cedet-files hides /usr/share/emacs/23.2/lisp/cedet/cedet-files /usr/share/emacs23/site-lisp/cedet-common/mode-local hides /usr/share/emacs/23.2/lisp/cedet/mode-local /usr/share/emacs23/site-lisp/cedet-common/inversion hides /usr/share/emacs/23.2/lisp/cedet/inversion /usr/share/emacs23/site-lisp/cedet-common/cedet hides /usr/share/emacs/23.2/lisp/cedet/cedet Features: (shadow sort mail-extr message sendmail regexp-opt ecomplete rfc822 mml easymenu mml-sec password-cache mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231 rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util netrc time-date mm-util mail-prsvr gmm-utils wid-edit mailheader canlock sha1 sha1-el hex-util hashcash mail-utils emacsbug perl-mode w3m-load org-install muse-autoloads emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode cedet-autogen advice advice-preload autoload help-fns preview-latex tex-site auto-loads tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd font-setting tool-bar dnd fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar mldrag 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 system-font-setting font-render-setting gtk x-toolkit x multi-tty emacs) From debbugs-submit-bounces@debbugs.gnu.org Thu Mar 10 04:29:02 2011 Received: (at 8218) by debbugs.gnu.org; 10 Mar 2011 09:29:02 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PxcB4-0001oI-0p for submit@debbugs.gnu.org; Thu, 10 Mar 2011 04:29:02 -0500 Received: from ibar.cds.caltech.edu ([131.215.42.49]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PxcB1-0001ny-7F for 8218@debbugs.gnu.org; Thu, 10 Mar 2011 04:28:59 -0500 Received: from smart (cpe-76-175-234-46.socal.res.rr.com [76.175.234.46]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ibar.cds.caltech.edu (Postfix) with ESMTP id 98901BA8276 for <8218@debbugs.gnu.org>; Thu, 10 Mar 2011 01:28:52 -0800 (PST) Date: Thu, 10 Mar 2011 01:28:50 -0800 From: Dima Kogan To: 8218@debbugs.gnu.org Subject: corrected attachment Message-ID: <20110310012850.54fa67d2@smart> X-Mailer: Claws Mail 3.7.8 (GTK+ 2.24.0; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="MP_/w5N6XPpLib8vm1wzBSoI0Dg" X-Spam-Score: -3.6 (---) X-Debbugs-Envelope-To: 8218 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: -3.5 (---) --MP_/w5N6XPpLib8vm1wzBSoI0Dg Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline I didn't attach the sample file correctly. Here it is. --MP_/w5N6XPpLib8vm1wzBSoI0Dg Content-Type: application/x-perl Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename=tst3.pm c3ViCnsKICAke1BPU1RNQVRDSH07Cn0K --MP_/w5N6XPpLib8vm1wzBSoI0Dg-- From debbugs-submit-bounces@debbugs.gnu.org Thu Mar 10 20:49:38 2011 Received: (at 8218-done) by debbugs.gnu.org; 11 Mar 2011 01:49:38 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PxrU2-0003Fs-FH for submit@debbugs.gnu.org; Thu, 10 Mar 2011 20:49:38 -0500 Received: from ironport2-out.teksavvy.com ([206.248.154.183] helo=ironport2-out.pppoe.ca) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PxrU0-0003Fc-5Z for 8218-done@debbugs.gnu.org; Thu, 10 Mar 2011 20:49:36 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEAOMNeU3O+IG+/2dsb2JhbACmNHjBT4ViBIUkkAmDQg X-IronPort-AV: E=Sophos;i="4.62,299,1297054800"; d="scan'208";a="95609542" Received: from 206-248-129-190.dsl.teksavvy.com (HELO ceviche.home) ([206.248.129.190]) by ironport2-out.pppoe.ca with ESMTP/TLS/ADH-AES256-SHA; 10 Mar 2011 20:49:30 -0500 Received: by ceviche.home (Postfix, from userid 20848) id 3683A66135; Thu, 10 Mar 2011 20:49:30 -0500 (EST) From: Stefan Monnier To: Dima Kogan Subject: Re: bug#8218: 23.2; scan-sexps sees inconsistent syntax Message-ID: References: Date: Thu, 10 Mar 2011 20:49:30 -0500 In-Reply-To: (Dima Kogan's message of "Thu, 10 Mar 2011 01:23:03 -0800") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 8218-done Cc: 8218-done@debbugs.gnu.org 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: -2.1 (--) > I am seeing (scan-sexps) show inconsistent behavior depending on WHEN it > is evaluated. If the attached sample file is opened, the point placed at > the first '{', and (scan-sexps (point) 1) evaluated, the returned > position is at times of the first '}' (wrong) and at other times of the > second '}' (right). If the evaluation is done right when the file is > opened, I observe the wrong behavior. This is reliably triggered with > $ emacs -Q /tmp/tst3.pm --eval '(goto-char (scan-sexps 5 1))' > Any subsequent evaluation of the same form in that buffer produces the > correct behavior. If I turn off font-lock-mode, I consistently get > incorrect behavior. This has wide ramifications with occasional > incorrect indentation and hide-show operation, for instance. This is not a bug in syntax.c: the syntax of Perl is too complex for the simple syntax-table mechanism, so it needs to use the escape hatch, i.e. the `syntax-table' property. This property is added to particular parts of the text via font-lock-syntactic-keywords (in Emacs-23) and via syntax-propertize (in Emacs-24). So in Emacs-23, you will only get the right answer if font-lock is enabled and has processed the relevant parts of the buffer. In Emacs-24, it can work right even if font-lock is disabled, but you still need to make sure the relevant parts of the buffer have been processed. For that, you should call (syntax-propertize POS) where POS is the upper bound of the chunk of text you're interested. Stefan From unknown Mon Jun 23 20:16:23 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Fri, 08 Apr 2011 11:24:04 +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