From unknown Tue Aug 19 10:01:17 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#49562 <49562@debbugs.gnu.org> To: bug#49562 <49562@debbugs.gnu.org> Subject: Status: 27.2; Crash with specific mode-line-format in BiDi processing Reply-To: bug#49562 <49562@debbugs.gnu.org> Date: Tue, 19 Aug 2025 17:01:17 +0000 retitle 49562 27.2; Crash with specific mode-line-format in BiDi processing reassign 49562 emacs submitter 49562 severity 49562 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Wed Jul 14 13:48:20 2021 Received: (at submit) by debbugs.gnu.org; 14 Jul 2021 17:48:21 +0000 Received: from localhost ([127.0.0.1]:45904 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3izc-0007JS-Bp for submit@debbugs.gnu.org; Wed, 14 Jul 2021 13:48:20 -0400 Received: from lists.gnu.org ([209.51.188.17]:43362) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3hwi-0005Y7-Ds for submit@debbugs.gnu.org; Wed, 14 Jul 2021 12:41:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41966) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3hwi-0004T2-68 for bug-gnu-emacs@gnu.org; Wed, 14 Jul 2021 12:41:16 -0400 Received: from mailout4.zih.tu-dresden.de ([141.30.67.75]:51866) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3hwf-0000sH-QP for bug-gnu-emacs@gnu.org; Wed, 14 Jul 2021 12:41:15 -0400 Received: from [172.26.34.116] (helo=msx.tu-dresden.de) by mailout4.zih.tu-dresden.de with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1m3hwb-00CWid-83 for bug-gnu-emacs@gnu.org; Wed, 14 Jul 2021 18:41:12 +0200 Received: from localhost (192.168.166.144) by MSX-L316.msx.ad.zih.tu-dresden.de (172.26.34.116) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2242.12; Wed, 14 Jul 2021 18:40:57 +0200 From: To: Subject: 27.2; Crash with specific mode-line-format in BiDi processing Date: Wed, 14 Jul 2021 18:40:57 +0200 Message-ID: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" X-ClientProxiedBy: MSX-L101.msx.ad.zih.tu-dresden.de (172.26.34.101) To MSX-L316.msx.ad.zih.tu-dresden.de (172.26.34.116) X-PMWin-Version: 4.0.4, Antivirus-Engine: 3.82.1, Antivirus-Data: 5.85 X-TUD-Virus-Scanned: mailout4.zih.tu-dresden.de Received-SPF: none client-ip=141.30.67.75; envelope-from=martin.bruestel@tu-dresden.de; helo=mailout4.zih.tu-dresden.de X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Wed, 14 Jul 2021 13:48:18 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) --=-=-= Content-Type: text/plain Emacs crashed when visiting specific pages in a browser using EXWM. Turns out this was triggered when the buffer was renamed accordingly. During redisplay, the crash happens for certain strings which are set as `mode-line-format`. I created an example to reproduce this with a stock Emacs configuration, see the attached elisp file. For me, this only triggers when the window is large enough, I suspect smaller windows will prevent the problematic part of the mode-line-format string to be processed. To reproduce: 1. Start Emacs using 'emacs' (not tested with 'emacs -Q') 2. Maximize Frame 3. M-x ielm 4. (load "/path/to/attached/break-emacs.el") 5. M-x crash-test-mode-line-format 6. Observe crash The output of 'bt full' is attached in 'gdb.txt' In GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.27, cairo version 1.16.0) Windowing system distributor 'The X.Org Foundation', version 11.0.12010000 System Description: NixOS 20.09 (Nightingale) Configured using: 'configure --prefix=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2 --bindir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/bin --sbindir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/sbin --includedir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/include --oldincludedir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/include --mandir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/share/man --infodir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/share/info --docdir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/share/doc/emacs --libdir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/lib --libexecdir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/libexec --localedir=/nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/share/locale --disable-build-details --with-modules --with-x-toolkit=gtk3 --with-xft --with-cairo' Configured features: XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD JSON PDUMPER GMP Important settings: value of $EMACSLOADPATH: value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Load-path shadows: /run/current-system/sw/share/emacs/site-lisp/site-start hides /nix/store/2csx4hz6ab0i6d5h4b7z1afwsydbx02n-emacs-packages-deps/share/emacs/site-lisp/site-start /run/current-system/sw/share/emacs/site-lisp/site-start hides /nix/store/l8wil534cr2bp339s27k6p2i8zyi5y6k-emacs-27.2/share/emacs/site-lisp/site-start Features: (shadow sort mail-extr emacsbug sendmail notmuch notmuch-tree notmuch-jump notmuch-hello wid-edit notmuch-show notmuch-print notmuch-crypto notmuch-mua notmuch-message notmuch-draft notmuch-maildir-fcc notmuch-address notmuch-company notmuch-parser notmuch-wash diff-mode easy-mmode coolj notmuch-query goto-addr thingatpt icalendar diary-lib diary-loaddefs cal-menu calendar cal-loaddefs notmuch-tag crm notmuch-lib notmuch-compat pcase hl-line message rmc puny dired dired-loaddefs format-spec rfc822 mml mailabbrev gmm-utils mailheader mm-view mml-smime mml-sec epa derived epg epg-config gnus-util rmail rmail-loaddefs mail-utils text-property-search time-date smime dig mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr package easymenu browse-url url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache json subr-x map url-vars seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify dynamic-setting system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 83001 9776) (symbols 48 9884 1) (strings 32 28953 2047) (string-bytes 1 1044840) (vectors 16 15878) (vector-slots 8 199051 14998) (floats 8 27 44) (intervals 56 319 0) (buffers 1000 14)) --=-=-= Content-Type: application/octet-stream Content-Disposition: attachment; filename="gdb.txt.gz" Content-Transfer-Encoding: base64 H4sICPYP72AAA2dkYi50eHQA7F17c6S2lv97/SmoTG3ZUzV2QLxn42x5Emfu1HU8WdtTk1Q2RdGg dhPT0Au03d7c7GdfCWhASKLVbtrtB1QlY6ODOG/9JKTjkyxzvUkQXUtZLM2S2INpKim6pZp7v5/D O+ns6y/5r9YfxO+m2fodt19NEuj6kg9H8+tr3OU8xf8Pg1GWtzj+SIKROwqh/8fel7xtEqcZSYB+ SdzkXvrm2yhYfJtmcQK/vbu9vp9EvppEhj9Z/O8o0RNTuV6A/7Gnk+t08ufhNXrKOwRHKjjUrG/R L982+zxK4yPlm6M9eSGjyxwbpmHLnmfKqhRE0iyFIfQy6eCtNE7iqbTxez38PmPv8tPHT+dXUpAi NUBfGt1L2QSWyoHJ0d5JAqX7eC6l8/KHOzfKsBW8iRtdQynI/lM6uJfiRIreSr+7UXoHE9TPb/+B mJ7NMymKs4LhDCbTIHLDP/Z+/HT5y9nJb9Kx9F7euzq9+Bn9tMDNh0A3vDiMk70PSCc3szhAr1Ik N5PkhT62fM16L42DEEpw6nrpkfcOmSGCkmraR80nQPmEDa2xVj6R9189ociKph/t/RBHWRDNkYWP 9n7/ES5dzB0jYul2HCc3BevodujXbmcA1fhjb6/0I0X65ijn5xCYR+DwLnG/kSZBJjVFeLeUPoOO 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charset="utf-8" Content-Transfer-Encoding: quoted-printable --=20 Martin Br=C3=BCstel Research Assistant TU Dresden, Processor Design Chair, Center for Advancing Electronics Dresde= n (cfaed) Tel: +49 351 43726 --=-=-=-- From debbugs-submit-bounces@debbugs.gnu.org Wed Jul 14 15:11:03 2021 Received: (at 49562) by debbugs.gnu.org; 14 Jul 2021 19:11:03 +0000 Received: from localhost ([127.0.0.1]:45982 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3kHf-00030c-CK for submit@debbugs.gnu.org; Wed, 14 Jul 2021 15:11:03 -0400 Received: from eggs.gnu.org ([209.51.188.92]:49132) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3kHe-000308-3R for 49562@debbugs.gnu.org; Wed, 14 Jul 2021 15:11:02 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:51968) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m3kHY-0002jZ-1r; Wed, 14 Jul 2021 15:10:56 -0400 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:1641 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3kHX-0004mf-M7; Wed, 14 Jul 2021 15:10:56 -0400 Date: Wed, 14 Jul 2021 22:10:49 +0300 Message-Id: <83pmvk7lty.fsf@gnu.org> From: Eli Zaretskii To: In-Reply-To: (martin.bruestel@tu-dresden.de) Subject: Re: bug#49562: 27.2; Crash with specific mode-line-format in BiDi processing References: X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 49562 Cc: 49562@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) > From: > Date: Wed, 14 Jul 2021 18:40:57 +0200 > > Emacs crashed when visiting specific pages in a browser using EXWM. > Turns out this was triggered when the buffer was renamed accordingly. > During redisplay, the crash happens for certain strings which are set as > `mode-line-format`. I created an example to reproduce this with a stock > Emacs configuration, see the attached elisp file. For me, this only > triggers when the window is large enough, I suspect smaller windows will > prevent the problematic part of the mode-line-format string to be > processed. > > To reproduce: > > 1. Start Emacs using 'emacs' (not tested with 'emacs -Q') > 2. Maximize Frame > 3. M-x ielm > 4. (load "/path/to/attached/break-emacs.el") > 5. M-x crash-test-mode-line-format > 6. Observe crash The "evil" mode-line string includes invalid use of bidi formatting controls: you have there a U+202A LEFT-TO-RIGHT EMBEDDING without a matching U+202C POP DIRECTIONAL FORMATTING. Removing the former or adding the latter avoids the crash. I will look into avoiding the crash even with the unbalanced control characters. I guess this imbalance triggers a subtle bug somewhere, which is somehow related to the use of (space (:align-to ...)) display spec. Hmm... From debbugs-submit-bounces@debbugs.gnu.org Thu Jul 15 05:30:49 2021 Received: (at 49562) by debbugs.gnu.org; 15 Jul 2021 09:30:49 +0000 Received: from localhost ([127.0.0.1]:46851 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3xhg-0006bu-Kc for submit@debbugs.gnu.org; Thu, 15 Jul 2021 05:30:49 -0400 Received: from mailout4.zih.tu-dresden.de ([141.30.67.75]:52630) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3xhe-0006UX-AW for 49562@debbugs.gnu.org; Thu, 15 Jul 2021 05:30:46 -0400 Received: from [172.26.34.116] (helo=msx.tu-dresden.de) by mailout4.zih.tu-dresden.de with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1m3xhU-00GrLY-59; Thu, 15 Jul 2021 11:30:40 +0200 Received: from localhost (192.168.166.144) by MSX-L316.msx.ad.zih.tu-dresden.de (172.26.34.116) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2242.12; Thu, 15 Jul 2021 11:30:28 +0200 From: Martin =?utf-8?Q?Br=C3=BCstel?= To: Eli Zaretskii Subject: Re: bug#49562: 27.2; Crash with specific mode-line-format in BiDi processing In-Reply-To: <83pmvk7lty.fsf@gnu.org> References: <83pmvk7lty.fsf@gnu.org> Date: Thu, 15 Jul 2021 11:30:27 +0200 Message-ID: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=sha256; protocol="application/pkcs7-signature" X-ClientProxiedBy: MSX-L106.msx.ad.zih.tu-dresden.de (172.26.34.106) To MSX-L316.msx.ad.zih.tu-dresden.de (172.26.34.116) X-PMWin-Version: 4.0.4, Antivirus-Engine: 3.82.1, Antivirus-Data: 5.85 X-TUD-Virus-Scanned: mailout4.zih.tu-dresden.de X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 49562 Cc: 49562@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Eli Zaretskii writes: >> From: >> Date: Wed, 14 Jul 2021 18:40:57 +0200 >>=20 >> Emacs crashed when visiting specific pages in a browser using EXWM. >> Turns out this was triggered when the buffer was renamed accordingly. >> During redisplay, the crash happens for certain strings which are set as >> `mode-line-format`. I created an example to reproduce this with a stock >> Emacs configuration, see the attached elisp file. For me, this only >> triggers when the window is large enough, I suspect smaller windows will >> prevent the problematic part of the mode-line-format string to be >> processed. > > The "evil" mode-line string includes invalid use of bidi formatting > controls: you have there a U+202A LEFT-TO-RIGHT EMBEDDING without a > matching U+202C POP DIRECTIONAL FORMATTING. Removing the former or > adding the latter avoids the crash. Thanks for finding the cause! It turns out, the control chars are actually already in the window title of the browser window. The imbalance results from truncating the name to a certain length. Is there any built-in functionality to either 1. "sanitize" a string to remove bidi formatting in a sane way, or 2. have `substring` functionality that can somehow deal with these formatting controls, or 3. restore balance of a possibly broken bidi formatted string? =2D-=20 Martin Br=C3=BCstel Research Assistant TU Dresden, Processor Design Chair, Center for Advancing Electronics Dresde= n (cfaed) Tel: +49 351 43726 --=-=-= Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEVYw ggUSMIID+qADAgECAgkA4wvV+K8l2YEwDQYJKoZIhvcNAQELBQAwgYIxCzAJBgNVBAYTAkRFMSsw KQYDVQQKDCJULVN5c3RlbXMgRW50ZXJwcmlzZSBTZXJ2aWNlcyBHbWJIMR8wHQYDVQQLDBZULVN5 c3RlbXMgVHJ1c3QgQ2VudGVyMSUwIwYDVQQDDBxULVRlbGVTZWMgR2xvYmFsUm9vdCBDbGFzcyAy MB4XDTE2MDIyMjEzMzgyMloXDTMxMDIyMjIzNTk1OVowgZUxCzAJBgNVBAYTAkRFMUUwQwYDVQQK EzxWZXJlaW4genVyIEZvZXJkZXJ1bmcgZWluZXMgRGV1dHNjaGVuIEZvcnNjaHVuZ3NuZXR6ZXMg 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4.84_2) (envelope-from ) id 1m3yGY-0000UY-RF for submit@debbugs.gnu.org; Thu, 15 Jul 2021 06:06:51 -0400 Received: from eggs.gnu.org ([209.51.188.92]:37454) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m3yGY-0000UL-5U for 49562@debbugs.gnu.org; Thu, 15 Jul 2021 06:06:50 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:42068) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m3yGS-00059C-4t; Thu, 15 Jul 2021 06:06:44 -0400 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4986 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m3yGR-0000bx-MQ; Thu, 15 Jul 2021 06:06:44 -0400 Date: Thu, 15 Jul 2021 13:06:25 +0300 Message-Id: <8335sf7uxq.fsf@gnu.org> From: Eli Zaretskii To: Martin =?utf-8?Q?Br=C3=BCstel?= In-Reply-To: (message from Martin =?utf-8?Q?Br=C3=BCstel?= on Thu, 15 Jul 2021 11:30:27 +0200) Subject: Re: bug#49562: 27.2; Crash with specific mode-line-format in BiDi processing References: <83pmvk7lty.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 49562 Cc: 49562@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) > From: Martin Brüstel > CC: <49562@debbugs.gnu.org> > Date: Thu, 15 Jul 2021 11:30:27 +0200 > > Is there any built-in functionality to either > > 1. "sanitize" a string to remove bidi formatting in a sane way, or > 2. have `substring` functionality that can somehow deal with these > formatting controls, or > 3. restore balance of a possibly broken bidi formatted string? Not as you describe it, no. You could remove all bidi formatting controls with subst-char-in-string or with string-match/replace-match, and then use bidi-string-mark-left-to-right to solve many problems with bidirectional display of mixed RTL and LTR text. But note that bidi-string-mark-left-to-right doesn't exactly wrap the string in an embedding, it does something smarter. From debbugs-submit-bounces@debbugs.gnu.org Sun Jul 18 14:12:14 2021 Received: (at 49562-done) by debbugs.gnu.org; 18 Jul 2021 18:12:14 +0000 Received: from localhost ([127.0.0.1]:57149 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m5BGv-0008SW-W6 for submit@debbugs.gnu.org; Sun, 18 Jul 2021 14:12:14 -0400 Received: from eggs.gnu.org ([209.51.188.92]:50580) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1m5BGu-0008S6-4R for 49562-done@debbugs.gnu.org; Sun, 18 Jul 2021 14:12:12 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:45090) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m57pO-0003Uw-AE; Sun, 18 Jul 2021 10:31:34 -0400 Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:4613 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m57pN-0001E6-U7; Sun, 18 Jul 2021 10:31:34 -0400 Date: Sun, 18 Jul 2021 17:31:25 +0300 Message-Id: <83lf637kxu.fsf@gnu.org> From: Eli Zaretskii To: Martin =?utf-8?Q?Br=C3=BCstel?= In-Reply-To: (message from Martin =?utf-8?Q?Br=C3=BCstel?= on Thu, 15 Jul 2021 11:30:27 +0200) Subject: Re: bug#49562: 27.2; Crash with specific mode-line-format in BiDi processing References: <83pmvk7lty.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 49562-done Cc: 49562-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 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: -3.3 (---) > From: Martin Brüstel > CC: <49562@debbugs.gnu.org> > Date: Thu, 15 Jul 2021 11:30:27 +0200 > > > The "evil" mode-line string includes invalid use of bidi formatting > > controls: you have there a U+202A LEFT-TO-RIGHT EMBEDDING without a > > matching U+202C POP DIRECTIONAL FORMATTING. Removing the former or > > adding the latter avoids the crash. > > Thanks for finding the cause! It turns out, the control chars are > actually already in the window title of the browser window. The > imbalance results from truncating the name to a certain length. This tricky bug is now fixed on the master branch. It actually revealed a design flaw in the original code. Thanks. From unknown Tue Aug 19 10:01:17 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: bug archived. Date: Mon, 16 Aug 2021 11:24:06 +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