From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: My Emacs unicode 2 crash again when I do some *Replace String (M-%)*, I give the debug informations under gdb in the attachments. Date: Fri, 09 Mar 2007 17:56:31 +0200 Message-ID: References: <20070306063056.GA21948@debian-testing-hy.localdomain> <86zm6q5upr.fsf@lola.quinscape.zz> <17902.9556.720278.162036@kahikatea.snap.net.nz> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: sea.gmane.org 1173455935 15968 80.91.229.12 (9 Mar 2007 15:58:55 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Fri, 9 Mar 2007 15:58:55 +0000 (UTC) Cc: miles.bader@necel.com, emacs-devel@gnu.org To: Andreas Schwab Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Mar 09 16:58:49 2007 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1HPhU1-0007vZ-C6 for ged-emacs-devel@m.gmane.org; Fri, 09 Mar 2007 16:58:36 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HPhUE-0006Hc-7r for ged-emacs-devel@m.gmane.org; Fri, 09 Mar 2007 10:58:30 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HPhSy-0005qk-LE for emacs-devel@gnu.org; Fri, 09 Mar 2007 10:57:12 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HPhSr-0005na-D7 for emacs-devel@gnu.org; Fri, 09 Mar 2007 10:57:12 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HPhSq-0005nO-HX for emacs-devel@gnu.org; Fri, 09 Mar 2007 10:57:05 -0500 Original-Received: from heller.inter.net.il ([213.8.233.23]) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1HPhSK-000898-2P for emacs-devel@gnu.org; Fri, 09 Mar 2007 10:56:32 -0500 Original-Received: from HOME-C4E4A596F7 (IGLD-80-230-36-31.inter.net.il [80.230.36.31]) by heller.inter.net.il (MOS 3.7.3a-GA) with ESMTP id CBW20731 (AUTH halo1); Fri, 9 Mar 2007 17:56:09 +0200 (IST) In-reply-to: (message from Andreas Schwab on Fri, 09 Mar 2007 16:26:03 +0100) X-detected-kernel: FreeBSD 4.7-5.2 (or MacOS X 10.2-10.4) (2) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:67624 Archived-At: > From: Andreas Schwab > Cc: Miles Bader , emacs-devel@gnu.org > Date: Fri, 09 Mar 2007 16:26:03 +0100 > > Eli Zaretskii writes: > > > To be user-friendlier to developers who want to debug optimized code. > > GCC gives all information it has to the debugger. It's up to the debugger > to make best use of it. But GCC can't invent information that does not > exist any more. An incoming argument register that is subsequently > resused for something different simply does not contain the original value > any more. I wasn't arguing that GCC had bugs in how it produces the debug info. I was arguing that there's no practical way for me to see a usable backtrace in an optimized program. No matter how you turn it, this remains a sad fact.