From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-prs-return-17712-listarch-gdb-prs=sources.redhat.com@sourceware.org>
Received: (qmail 129330 invoked by alias); 24 Mar 2015 09:17:25 -0000
Mailing-List: contact gdb-prs-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <gdb-prs.sourceware.org>
List-Subscribe: <mailto:gdb-prs-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/gdb-prs/>
List-Post: <mailto:gdb-prs@sourceware.org>
List-Help: <mailto:gdb-prs-help@sourceware.org>, <http://sourceware.org/lists.html#faqs>
Sender: gdb-prs-owner@sourceware.org
Received: (qmail 129307 invoked by uid 48); 24 Mar 2015 09:17:24 -0000
From: "sourceware at optimojoe dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug c++/18157] New: Segfault when debugging a program where an
 initializer list contains a lambda function with auto variables
Date: Tue, 24 Mar 2015 10:13:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gdb
X-Bugzilla-Component: c++
X-Bugzilla-Version: 7.7
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: sourceware at optimojoe dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter
Message-ID: <bug-18157-4717@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-q1/txt/msg00477.txt.bz2

https://sourceware.org/bugzilla/show_bug.cgi?id=18157

            Bug ID: 18157
           Summary: Segfault when debugging a program where an initializer
                    list contains a lambda function with auto variables
           Product: gdb
           Version: 7.7
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: sourceware at optimojoe dot com

The following program:

------
#include <functional>

struct Foo {
    std::function <void(double &)> f;
    Foo (
        std::function <void(double &)> const & f_ 
    ) : f(f_) {}
};

struct Bar {
    Foo foo;
    Bar() :
        foo([](auto & num) {})
    {}
};

int main() {
    Bar bar;
}
------

segfaults gdb on startup:

$ gdb test19
GNU gdb (Gentoo 7.7.1 p1) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://bugs.gentoo.org/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from test19...Segmentation fault

However, when changing the line

        foo([](auto & num) {})

to

        foo([](double & num) {})

gdb works as normal.  In case it helps:

GNU gdb (Gentoo 7.7.1 p1) 7.7.1
gcc version 4.9.2 (Gentoo 4.9.2 p1.0, pie-0.6.1)

-- 
You are receiving this mail because:
You are on the CC list for the bug.