From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#9318: 23.3.50; The first call of encode-coding-region() returns wrong result Date: Wed, 24 Aug 2011 15:06:48 +0300 Message-ID: <83ty97ggiv.fsf@gnu.org> References: <20110818090129.DC129360038@msa102.auone-net.jp> <20110819134637.9727A34803A@msa103.auone-net.jp> <877h67vkpf.fsf@stupidchicken.com> <20110821001726.D29052C037@msa104.auone-net.jp> <20110824093755.8E190360038@msa102.auone-net.jp> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1314187660 6159 80.91.229.12 (24 Aug 2011 12:07:40 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 24 Aug 2011 12:07:40 +0000 (UTC) Cc: cyd@stupidchicken.com, 9318@debbugs.gnu.org To: Kazuhiro Ito Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Aug 24 14:07:36 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QwCF4-0000ff-MV for geb-bug-gnu-emacs@m.gmane.org; Wed, 24 Aug 2011 14:07:34 +0200 Original-Received: from localhost ([::1]:34018 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QwCF4-0000Q8-4r for geb-bug-gnu-emacs@m.gmane.org; Wed, 24 Aug 2011 08:07:34 -0400 Original-Received: from eggs.gnu.org ([140.186.70.92]:54221) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QwCF1-0000Pp-KY for bug-gnu-emacs@gnu.org; Wed, 24 Aug 2011 08:07:32 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QwCEz-0003Hf-VK for bug-gnu-emacs@gnu.org; Wed, 24 Aug 2011 08:07:31 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:35855) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QwCEz-0003Hb-SS for bug-gnu-emacs@gnu.org; Wed, 24 Aug 2011 08:07:29 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1QwCHS-0008Ay-JS; Wed, 24 Aug 2011 08:10:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 24 Aug 2011 12:10:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 9318 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 9318-submit@debbugs.gnu.org id=B9318.131418779431413 (code B ref 9318); Wed, 24 Aug 2011 12:10:02 +0000 Original-Received: (at 9318) by debbugs.gnu.org; 24 Aug 2011 12:09:54 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QwCHK-0008Ac-Gs for submit@debbugs.gnu.org; Wed, 24 Aug 2011 08:09:54 -0400 Original-Received: from mtaout20.012.net.il ([80.179.55.166]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1QwCHI-0008AT-74 for 9318@debbugs.gnu.org; Wed, 24 Aug 2011 08:09:53 -0400 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0LQF00700LF5J600@a-mtaout20.012.net.il> for 9318@debbugs.gnu.org; Wed, 24 Aug 2011 15:06:49 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([77.126.219.41]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0LQF007A9LN8DN50@a-mtaout20.012.net.il>; Wed, 24 Aug 2011 15:06:47 +0300 (IDT) In-reply-to: <20110824093755.8E190360038@msa102.auone-net.jp> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Wed, 24 Aug 2011 08:10:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 1) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:50279 Archived-At: > Date: Wed, 24 Aug 2011 18:37:24 +0900 > From: Kazuhiro Ito > Cc: 9318@debbugs.gnu.org > > > (progn > > (goto-char (point-min)) > > (insert #x80) > > (insert (make-string 16 ?A)) > > (encode-coding-region 1 18 'ctext-unix)) > > > > backtrace is below. Please let me know if you need more information. > > > > > > Program received signal SIGSEGV, Segmentation fault. > > 0x0000000000557419 in mark_object (arg=4702111234474983745) at alloc.c:5473 > > 5473 if (STRING_MARKED_P (ptr)) > > I think relocation of buffer may cause the problem. > > The comment for CODING_DECODE_CHAR macro in coding.c says as below. > > > /* This wrapper macro is used to preserve validity of pointers into > > buffer text across calls to decode_char, which could cause > > relocation of buffers if it loads a charset map, because loading a > > charset map allocates large structures. */ > > encode_coding_iso_2022() uses ENCODE_ISO_CHARACTER macro, which uses > ENCODE_CHAR macro. ENCODE_CHAR macro calls encode_char() and it may > load a charset map. But which pointer(s) in encode_coding_iso_2022 can be altered by relocation? Do you actually see any of the pointers used by this function modified by relocation of some buffer?