From unknown Sun Jun 22 07:49:25 2025 X-Loop: help-debbugs@gnu.org Subject: bug#7593: 24.0.50; No response from 'occur' (infinite loop when regexp matches empty string?) Resent-From: Larry Denenberg Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 08 Dec 2010 18:58:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 7593 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 7593@debbugs.gnu.org Cc: larry@denenberg.com X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.12918346583156 (code B ref -1); Wed, 08 Dec 2010 18:58:01 +0000 Received: (at submit) by debbugs.gnu.org; 8 Dec 2010 18:57:38 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PQPCr-0000oq-AE for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:57:38 -0500 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PQP3d-0000YZ-3J for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:48:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PQP9O-0003YA-4z for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:54:03 -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 autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([199.232.76.165]:52819) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PQP9O-0003Y5-1R for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:54:02 -0500 Received: from [140.186.70.92] (port=55736 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PQP9M-0007Wr-4m for bug-gnu-emacs@gnu.org; Wed, 08 Dec 2010 13:54:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PQP9B-0003UJ-PL for bug-gnu-emacs@gnu.org; Wed, 08 Dec 2010 13:53:59 -0500 Received: from smtp2go.com ([207.58.142.213]:38954) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PQP9B-0003Tc-LH for bug-gnu-emacs@gnu.org; Wed, 08 Dec 2010 13:53:49 -0500 Received: from [140.247.179.41] (helo=vegas.jjd.com) by smtp2go.com with esmtp (Exim 4.69) (envelope-from ) id 1PQP97-0003CN-1h; Wed, 08 Dec 2010 18:53:45 +0000 From: Larry Denenberg X-Mailer: MH-E 8.1; nmh 1.3; GNU Emacs 24.0.50 Date: Wed, 08 Dec 2010 13:53:36 -0500 Message-ID: <21977.1291834416@vegas.jjd.com> X-SMTP2Go-MailScanner-Information: Please contact support@smtp2go.com for more information X-SMTP2Go-MailScanner-ID: 1PQP97-0003CN-1h X-SMTP2Go-MailScanner: Found to be clean X-SMTP2Go-MailScanner-From: larry@denenberg.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Spam-Score: -6.6 (------) X-Mailman-Approved-At: Wed, 08 Dec 2010 13:57:36 -0500 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 (------) This bug manifests in all versions of GNU emacs that I have. The facts: 1) Start with 'emacs -nw -Q'. We see buffer *scratch* containing the initial greeting ';; This buffer is for notes . . .'. 2) Enter 'M-x occur'. We're now in the minibuffer with prompt 'List lines matching regexp:'. 3) Enter 'a*'. Emacs stops responding. I believe the problem is in function occur-engine (file replace.el), specifically the section labelled 'Highlight the matches'. ;; Highlight the matches (let ((len (length curstring)) (start 0)) (while (and (< start len) (string-match regexp curstring start)) (add-text-properties (match-beginning 0) (match-end 0) (append `(occur-match t) (when match-face ;; Use `face' rather than `font-lock-face' here ;; so as to override faces copied from the buffer. `(face ,match-face))) curstring) (setq start (match-end 0)))) When the given regexp matches a null string, the final line of code here does not change variable start, so we loop infinitely. /Larry Denenberg larry@denenberg.com http://larry.denenberg.com/ In GNU Emacs 24.0.50.1 (i386-apple-darwin9.8.0, NS apple-appkit-949.54) of 2010-08-10 on braeburn.aquamacs.org - Aquamacs Distribution 2.1dev Windowing system distributor `Apple', version 10.3.1038 configured using `configure '--with-ns' '--without-x' 'CFLAGS=-arch i386 -arch ppc' 'LDFLAGS=-arch i386 -arch ppc'' 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: nil value of $XMODIFIERS: nil locale-coding-system: nil default enable-multibyte-characters: t Major mode: Info Minor modes in effect: TeX-PDF-mode: t TeX-source-correlate-mode: t display-time-mode: t savehist-mode: t smart-frame-positioning-mode: t aquamacs-autoface-mode: t recentf-mode: t osx-key-mode: t show-paren-mode: t delete-selection-mode: t pc-selection-mode: t cua-mode: t tooltip-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-xface hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-xface /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-utils hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-utils /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-tool-bar hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-tool-bar /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-thread hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-thread /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-speed hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-speed /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-show hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-show /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-seq hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-seq /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-search hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-search /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-scan hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-scan /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-print hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-print /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-mime hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-mime /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-loaddefs hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-loaddefs /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-limit hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-limit /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-letter hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-letter /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-junk hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-junk /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-inc hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-inc /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-identity hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-identity /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-gnus hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-gnus /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-funcs hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-funcs /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-folder hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-folder /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-e hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-e /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-compat hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-compat /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-comp hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-comp /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-buffers hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-buffers /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-alias hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-alias /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-acros hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-acros /Users/larry/Emacs/Bin/hebrew hides /Applications/Aquamacs.app/Contents/Resources/lisp/language/hebrew Features: (shadow emacsbug thai-util thai-word lao-util flyspell ispell cua-rect rect utf-7 compile comint ring find-func sort mule-util info mh-limit browse-url flow-fill cperl-mode dabbrev mh-thread multi-isearch mh-funcs mh-search mh-alias multi-prompt crm qp mail-extr mh-identity mh-letter mh-comp smiley mh-mime mh-gnus mh-show goto-addr gnus-cite gnus-art mm-uu mml2015 pgg pgg-parse pgg-def epg-config mm-view smime password-cache dig gnus-sum nnoo gnus-group gnus-undo nnmail mail-source format-spec gnus-start gnus-spec gnus-int message rfc822 mml mml-sec mm-decode mm-bodies mm-encode gmm-utils mailheader gnus-win gnus-range gnus gnus-ems nnheader mh-inc hl-line mh-tool-bar mh-seq mh-xface mh-utils mh-folder which-func imenu mh-scan mh-e mh-compat mailabbrev mh-acros mh-buffers mh-loaddefs time-stamp newcomment texmathp preview prv-emacs reftex-vcr reftex-dcr reftex-auc reftex reftex-vars bib-cite tex-fold tex-bar tex-buf toolbar-x noutline outline font-latex latex tex-style tex latexenc ebuff-menu electric url-http tls url-auth mail-parse rfc2231 rfc2047 rfc2045 ietf-drums url-gw url-cache url url-proxy url-privacy url-expand url-methods url-history url-cookie url-util url-parse auth-source gnus-util url-vars mm-util mail-prsvr mailcap mail-utils time-date package quail help-mode jka-compr time edmacro kmacro load-emacs-plugins aquamacs-mode-defaults auctex-config server preview-latex tex-site auto-loads smart-dnd aquamacs-aux savehist mouse-sel one-buffer-one-frame smart-frame-positioning drews_init color-theme-autoloads view saveplace visual-line aquamacs-bug aquamacs-autoface-mode aquamacs-editing sendmail recentf tree-widget cus-edit osxkeys emulate-mac-keyboard-mode frame-cmds strings misc-fns thingatpt+ thingatpt frame-fns avoid aquamacs-mac-fontsets fit-frame aquamacs-frame-setup aquamacs-tabbar tabbar-window cl cl-19 tabbar warnings cus-start cus-load load-emacs-pre-plugins aquamacs-site-start filladapt aquamacs-redo check-for-updates aquamacs-menu osx_defaults aquamacs-tool-bar aquamacs mac-extra-functions aquamacs-tools aquamacs-macros parse-time timezone paren delsel pc-select cua-base wid-edit regexp-opt advice advice-preload byte-opt bytecomp byte-compile debug help-fns image-file disp-table easy-mmode tooltip ediff-hook vc-hooks lisp-float-type mwheel ns-win easymenu 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 ns multi-tty emacs) From unknown Sun Jun 22 07:49:25 2025 MIME-Version: 1.0 X-Mailer: MIME-tools 5.503 (Entity 5.503) X-Loop: help-debbugs@gnu.org From: help-debbugs@gnu.org (GNU bug Tracking System) To: Larry Denenberg Subject: bug#7593: closed (Re: bug#7593: 24.0.50; No response from 'occur' (infinite loop when regexp matches empty string?)) Message-ID: References: <87ppoupwu3.fsf@gnu.org> <21977.1291834416@vegas.jjd.com> X-Gnu-PR-Message: they-closed 7593 X-Gnu-PR-Package: emacs Reply-To: 7593@debbugs.gnu.org Date: Wed, 18 Dec 2013 05:12:02 +0000 Content-Type: multipart/mixed; boundary="----------=_1387343522-20298-1" This is a multi-part message in MIME format... ------------=_1387343522-20298-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Your bug report #7593: 24.0.50; No response from 'occur' (infinite loop when regexp matches= empty string?) which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 7593@debbugs.gnu.org. --=20 7593: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D7593 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems ------------=_1387343522-20298-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at 7593-done) by debbugs.gnu.org; 18 Dec 2013 05:11:39 +0000 Received: from localhost ([127.0.0.1]:56472 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Vt9Q2-0005Gj-PT for submit@debbugs.gnu.org; Wed, 18 Dec 2013 00:11:39 -0500 Received: from mail-pd0-f181.google.com ([209.85.192.181]:47592) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Vt9Pz-0005GZ-Ly for 7593-done@debbugs.gnu.org; Wed, 18 Dec 2013 00:11:36 -0500 Received: by mail-pd0-f181.google.com with SMTP id p10so7708733pdj.40 for <7593-done@debbugs.gnu.org>; Tue, 17 Dec 2013 21:11:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:references:date:in-reply-to:message-id :user-agent:mime-version:content-type; bh=wlWhqIRNO3RCbZyo6xwrtEEHmSVif+43MAwh3Gtoq6s=; b=M85Js0UOwwOw/QbiThj2s3I1amaqmzF38RAJUdD7ZJ6UBi7cmCDbZANaf0LsWDSYTg PcSrrzVYbbcX3/TPemjrU9G0UoOSfUHz1PaO8+zT8Sj9AbR8Pd9ItMEzgEzDtjwcdoej 8l5aDsPBTa8qzBfDZKz7KZqozKZwRay9IkN3eFoCKh0cnUaGN/64IPJfmHS1qUMYU5jN ZSV5ASoSNA90SDuEejjKso+qfhYvrjKb1jEsPekqtACleK6nqmbocSBIeRZ4RE0kGEih u4watYeRh35oZelOwNQPBsqHwDIorwmx161CtsvkVY+zdn/fqGXtmDJ1dPRKjB06gQaT dm4g== X-Received: by 10.67.3.3 with SMTP id bs3mr32151549pad.46.1387343494685; Tue, 17 Dec 2013 21:11:34 -0800 (PST) Received: from tsparkle ([155.69.19.37]) by mx.google.com with ESMTPSA id ki1sm37963890pbd.1.2013.12.17.21.11.32 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 17 Dec 2013 21:11:33 -0800 (PST) From: Chong Yidong To: Larry Denenberg Subject: Re: bug#7593: 24.0.50; No response from 'occur' (infinite loop when regexp matches empty string?) References: <21977.1291834416@vegas.jjd.com> Date: Wed, 18 Dec 2013 13:11:32 +0800 In-Reply-To: <21977.1291834416@vegas.jjd.com> (Larry Denenberg's message of "Wed, 08 Dec 2010 13:53:36 -0500") Message-ID: <87ppoupwu3.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 7593-done Cc: 7593-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 0.0 (/) > 1) Start with 'emacs -nw -Q'. We see buffer *scratch* containing the > initial greeting ';; This buffer is for notes . . .'. > > 2) Enter 'M-x occur'. We're now in the minibuffer with prompt > 'List lines matching regexp:'. > > 3) Enter 'a*'. Emacs stops responding. Fixed, thanks. ------------=_1387343522-20298-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at submit) by debbugs.gnu.org; 8 Dec 2010 18:57:38 +0000 Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PQPCr-0000oq-AE for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:57:38 -0500 Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1PQP3d-0000YZ-3J for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:48:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PQP9O-0003YA-4z for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:54:03 -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 autolearn=unavailable version=3.3.1 Received: from lists.gnu.org ([199.232.76.165]:52819) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PQP9O-0003Y5-1R for submit@debbugs.gnu.org; Wed, 08 Dec 2010 13:54:02 -0500 Received: from [140.186.70.92] (port=55736 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PQP9M-0007Wr-4m for bug-gnu-emacs@gnu.org; Wed, 08 Dec 2010 13:54:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PQP9B-0003UJ-PL for bug-gnu-emacs@gnu.org; Wed, 08 Dec 2010 13:53:59 -0500 Received: from smtp2go.com ([207.58.142.213]:38954) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PQP9B-0003Tc-LH for bug-gnu-emacs@gnu.org; Wed, 08 Dec 2010 13:53:49 -0500 Received: from [140.247.179.41] (helo=vegas.jjd.com) by smtp2go.com with esmtp (Exim 4.69) (envelope-from ) id 1PQP97-0003CN-1h; Wed, 08 Dec 2010 18:53:45 +0000 To: bug-gnu-emacs@gnu.org From: Larry Denenberg X-Mailer: MH-E 8.1; nmh 1.3; GNU Emacs 24.0.50 Date: Wed, 08 Dec 2010 13:53:36 -0500 Message-ID: <21977.1291834416@vegas.jjd.com> X-SMTP2Go-MailScanner-Information: Please contact support@smtp2go.com for more information X-SMTP2Go-MailScanner-ID: 1PQP97-0003CN-1h X-SMTP2Go-MailScanner: Found to be clean X-SMTP2Go-MailScanner-From: larry@denenberg.com Subject: 24.0.50; No response from 'occur' (infinite loop when regexp matches empty string?) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Spam-Score: -6.6 (------) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Wed, 08 Dec 2010 13:57:36 -0500 Cc: larry@denenberg.com 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 (------) This bug manifests in all versions of GNU emacs that I have. The facts: 1) Start with 'emacs -nw -Q'. We see buffer *scratch* containing the initial greeting ';; This buffer is for notes . . .'. 2) Enter 'M-x occur'. We're now in the minibuffer with prompt 'List lines matching regexp:'. 3) Enter 'a*'. Emacs stops responding. I believe the problem is in function occur-engine (file replace.el), specifically the section labelled 'Highlight the matches'. ;; Highlight the matches (let ((len (length curstring)) (start 0)) (while (and (< start len) (string-match regexp curstring start)) (add-text-properties (match-beginning 0) (match-end 0) (append `(occur-match t) (when match-face ;; Use `face' rather than `font-lock-face' here ;; so as to override faces copied from the buffer. `(face ,match-face))) curstring) (setq start (match-end 0)))) When the given regexp matches a null string, the final line of code here does not change variable start, so we loop infinitely. /Larry Denenberg larry@denenberg.com http://larry.denenberg.com/ In GNU Emacs 24.0.50.1 (i386-apple-darwin9.8.0, NS apple-appkit-949.54) of 2010-08-10 on braeburn.aquamacs.org - Aquamacs Distribution 2.1dev Windowing system distributor `Apple', version 10.3.1038 configured using `configure '--with-ns' '--without-x' 'CFLAGS=-arch i386 -arch ppc' 'LDFLAGS=-arch i386 -arch ppc'' 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: nil value of $XMODIFIERS: nil locale-coding-system: nil default enable-multibyte-characters: t Major mode: Info Minor modes in effect: TeX-PDF-mode: t TeX-source-correlate-mode: t display-time-mode: t savehist-mode: t smart-frame-positioning-mode: t aquamacs-autoface-mode: t recentf-mode: t osx-key-mode: t show-paren-mode: t delete-selection-mode: t pc-selection-mode: t cua-mode: t tooltip-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-xface hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-xface /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-utils hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-utils /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-tool-bar hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-tool-bar /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-thread hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-thread /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-speed hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-speed /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-show hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-show /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-seq hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-seq /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-search hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-search /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-scan hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-scan /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-print hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-print /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-mime hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-mime /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-loaddefs hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-loaddefs /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-limit hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-limit /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-letter hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-letter /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-junk hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-junk /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-inc hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-inc /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-identity hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-identity /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-gnus hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-gnus /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-funcs hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-funcs /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-folder hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-folder /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-e hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-e /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-compat hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-compat /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-comp hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-comp /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-buffers hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-buffers /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-alias hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-alias /Users/larry/Emacs/mh-e-8.1/emacs/lisp/mh-e/mh-acros hides /Applications/Aquamacs.app/Contents/Resources/lisp/mh-e/mh-acros /Users/larry/Emacs/Bin/hebrew hides /Applications/Aquamacs.app/Contents/Resources/lisp/language/hebrew Features: (shadow emacsbug thai-util thai-word lao-util flyspell ispell cua-rect rect utf-7 compile comint ring find-func sort mule-util info mh-limit browse-url flow-fill cperl-mode dabbrev mh-thread multi-isearch mh-funcs mh-search mh-alias multi-prompt crm qp mail-extr mh-identity mh-letter mh-comp smiley mh-mime mh-gnus mh-show goto-addr gnus-cite gnus-art mm-uu mml2015 pgg pgg-parse pgg-def epg-config mm-view smime password-cache dig gnus-sum nnoo gnus-group gnus-undo nnmail mail-source format-spec gnus-start gnus-spec gnus-int message rfc822 mml mml-sec mm-decode mm-bodies mm-encode gmm-utils mailheader gnus-win gnus-range gnus gnus-ems nnheader mh-inc hl-line mh-tool-bar mh-seq mh-xface mh-utils mh-folder which-func imenu mh-scan mh-e mh-compat mailabbrev mh-acros mh-buffers mh-loaddefs time-stamp newcomment texmathp preview prv-emacs reftex-vcr reftex-dcr reftex-auc reftex reftex-vars bib-cite tex-fold tex-bar tex-buf toolbar-x noutline outline font-latex latex tex-style tex latexenc ebuff-menu electric url-http tls url-auth mail-parse rfc2231 rfc2047 rfc2045 ietf-drums url-gw url-cache url url-proxy url-privacy url-expand url-methods url-history url-cookie url-util url-parse auth-source gnus-util url-vars mm-util mail-prsvr mailcap mail-utils time-date package quail help-mode jka-compr time edmacro kmacro load-emacs-plugins aquamacs-mode-defaults auctex-config server preview-latex tex-site auto-loads smart-dnd aquamacs-aux savehist mouse-sel one-buffer-one-frame smart-frame-positioning drews_init color-theme-autoloads view saveplace visual-line aquamacs-bug aquamacs-autoface-mode aquamacs-editing sendmail recentf tree-widget cus-edit osxkeys emulate-mac-keyboard-mode frame-cmds strings misc-fns thingatpt+ thingatpt frame-fns avoid aquamacs-mac-fontsets fit-frame aquamacs-frame-setup aquamacs-tabbar tabbar-window cl cl-19 tabbar warnings cus-start cus-load load-emacs-pre-plugins aquamacs-site-start filladapt aquamacs-redo check-for-updates aquamacs-menu osx_defaults aquamacs-tool-bar aquamacs mac-extra-functions aquamacs-tools aquamacs-macros parse-time timezone paren delsel pc-select cua-base wid-edit regexp-opt advice advice-preload byte-opt bytecomp byte-compile debug help-fns image-file disp-table easy-mmode tooltip ediff-hook vc-hooks lisp-float-type mwheel ns-win easymenu 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 ns multi-tty emacs) ------------=_1387343522-20298-1--