From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-334011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 26483 invoked by alias); 17 Oct 2010 13:58:22 -0000
Received: (qmail 26474 invoked by uid 22791); 17 Oct 2010 13:58:21 -0000
X-SWARE-Spam-Status: No, hits=-2.6 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sun, 17 Oct 2010 13:58:16 +0000
From: "alserkli at inbox dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/46056] New: range-based for loop inside lambda crashes if _GLIBCXX_DEBUG is defined
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: alserkli at inbox dot ru
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-46056-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Date: Sun, 17 Oct 2010 13:58:00 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2010-10/txt/msg01400.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46056

           Summary: range-based for loop inside lambda crashes if
                    _GLIBCXX_DEBUG is defined
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: alserkli@inbox.ru
            Target: i686-pc-linux-gnu


The following test crashes once compiled by
g++ (GCC) 4.6.0 20101017 (experimental) on i686-pc-linux-gnu

// Test for range-based for loop inside lambda
// { dg-options "-std=c++0x" }
// { dg-do run }
#define _GLIBCXX_DEBUG
#include <iostream>
#include <vector>
int main(){
  std::vector<int> v(1);
  [&]() { for(auto i: v); }();
}

Apparently it crashes during safe sequence destruction once main is finished.
It does work (i.e., does not crash) without any one of _GLIBCXX_DEBUG, lambda,
or range-based for. Also, it does not crash if optimization is on (e.g., with
-O).