From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 22053 invoked by alias); 14 Jul 2014 00:47:08 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 21953 invoked by uid 48); 14 Jul 2014 00:47:00 -0000 From: "jvdelisle at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/61632] memory corruption in Fortran RTL when writing formatted data Date: Mon, 14 Jul 2014 00:47:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Version: 4.8.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jvdelisle at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jvdelisle at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-07/txt/msg00831.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61632 --- Comment #9 from Jerry DeLisle --- Its not really a glitch. In this case reversion has occurred so i can only approximate where in the string the error occured. I can improve on it with: offset = fmt->reversion_ok ? fmt->format_string_len + 2: dtp->format_len - fmt->format_string_len; I don't think I can do better for now. Of course we want diagnostics to be helpful, but they can not be perfect. I would suggest we commit the patch for now.