From mboxrd@z Thu Jan  1 00:00:00 1970
From: Neil Jerram <neil@ossau.homelinux.net>
Subject: Re: Emacs sagmentation fault error on a big org-mode file movement
Date: Sat, 16 Dec 2017 10:58:36 +0000
Message-ID: <00d6f98c-31b2-fd9e-e4af-e6d9445d8945@ossau.homelinux.net>
References: <CAL1eYu+BQvvq442mEc5cAPm3JGwetBx0wONmxzM0DgnHmO5MQw@mail.gmail.com>
Mime-Version: 1.0
Content-Type: multipart/alternative;
	boundary="------------CEA8F5085777CF6F5394EE02"
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:48944)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <neil@ossau.homelinux.net>) id 1eQAB4-0007dk-Ts
	for emacs-orgmode@gnu.org; Sat, 16 Dec 2017 05:58:48 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <neil@ossau.homelinux.net>) id 1eQAB0-0002t7-Us
	for emacs-orgmode@gnu.org; Sat, 16 Dec 2017 05:58:46 -0500
Received: from smtp-out-3.talktalk.net ([62.24.135.67]:57289)
	by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)
	(Exim 4.71) (envelope-from <neil@ossau.homelinux.net>)
	id 1eQAB0-0002rN-LU
	for emacs-orgmode@gnu.org; Sat, 16 Dec 2017 05:58:42 -0500
In-Reply-To: <CAL1eYu+BQvvq442mEc5cAPm3JGwetBx0wONmxzM0DgnHmO5MQw@mail.gmail.com>
Content-Language: en-US
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/emacs-orgmode/>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
	<mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org
Sender: "Emacs-orgmode"
	<emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org>
To: "numbchild@gmail.com" <numbchild@gmail.com>, Org-mode <emacs-orgmode@gnu.org>, emacs-help <help-gnu-emacs@gnu.org>

This is a multi-part message in MIME format.
--------------CEA8F5085777CF6F5394EE02
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit

I would suggest (but without detailed knowledge of current emacs practice):

1. Report your exact emacs version.

2. Install a corresponding debug symbols package, if your distro 
provides that.  That should add a lot more interesting detail to the 
backtrace.

3. To go further, repro under GDB, ideally with corresponding source 
code.  Then you could explore the immediate cause of the segfault.

     Neil


On 16/12/17 04:27, numbchild@gmail.com wrote:
> I have a big org-mode file which is overview at startup. When I 
> navigate around with [C-v] and [M-v]. The Emacs crashed.
>
> Here is the output from command-line:
> ```
> Fatal error 11: Segmentation fault
> Backtrace:
> emacs[0x51195e]
> emacs[0x4f739a]
> emacs[0x50fe3e]
> emacs[0x510058]
> emacs[0x5100dc]
> /usr/lib/libpthread.so.0(+0x11da0)[0x7fcb1cdcada0]
> emacs[0x4caa74]
> emacs[0x45b2b5]
> emacs[0x4613e9]
> emacs[0x41eb42]
> emacs[0x42087c]
> emacs[0x42157a]
> emacs[0x421567]
> emacs[0x421567]
> emacs[0x42351d]
> emacs[0x458015]
> emacs[0x501893]
> emacs[0x50465a]
> emacs[0x5061dc]
> emacs[0x56c85e]
> emacs[0x4f7754]
> emacs[0x56c7cd]
> emacs[0x4f76eb]
> emacs[0x4fc313]
> emacs[0x4fc636]
> emacs[0x41b302]
> /usr/lib/libc.so.6(__libc_start_main+0xea)[0x7fcb1bf30f4a]
> emacs[0x41c01a]
> [1]    17259 segmentation fault (core dumped)  emacs --debug-init
> ```
> Is there a way to debug this?
> I know it is not possible to invoke edebug on anything internal Emacs.
> So is there any system (Linux)  solution?
> Like system process dump or traceback.
>
> I'm using latest version `master` branch source code Org-mode.
> Emacs is from compiled `master` branch  source code too.
>
> [stardiviner]           <Hack this world!>      GPG key ID: 47C32433
> IRC(freeenode): stardiviner Twitter:  @numbchild
> Key fingerprint = 9BAA 92BC CDDD B9EF 3B36  CB99 B8C4 B8E5 47C3 2433
> Blog: http://stardiviner.github.io/


--------------CEA8F5085777CF6F5394EE02
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <p>I would suggest (but without detailed knowledge of current emacs
      practice):</p>
    <p>1. Report your exact emacs version.</p>
    <p>2. Install a corresponding debug symbols package, if your distro
      provides that.  That should add a lot more interesting detail to
      the backtrace.</p>
    <p>3. To go further, repro under GDB, ideally with corresponding
      source code.  Then you could explore the immediate cause of the
      segfault.</p>
    <p>    Neil<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 16/12/17 04:27, <a class="moz-txt-link-abbreviated" href="mailto:numbchild@gmail.com">numbchild@gmail.com</a>
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAL1eYu+BQvvq442mEc5cAPm3JGwetBx0wONmxzM0DgnHmO5MQw@mail.gmail.com">
      <div dir="ltr">
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">I have a big org-mode file which is overview at
          startup. When I navigate around with [C-v] and [M-v]. The
          Emacs crashed.</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif"><br>
        </div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">Here is the output from command-line:</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">```</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">Fatal error 11: Segmentation fault<br>
          Backtrace:<br>
          emacs[0x51195e]<br>
          emacs[0x4f739a]<br>
          emacs[0x50fe3e]<br>
          emacs[0x510058]<br>
          emacs[0x5100dc]<br>
          /usr/lib/libpthread.so.0(+0x11da0)[0x7fcb1cdcada0]<br>
          emacs[0x4caa74]<br>
          emacs[0x45b2b5]<br>
          emacs[0x4613e9]<br>
          emacs[0x41eb42]<br>
          emacs[0x42087c]<br>
          emacs[0x42157a]<br>
          emacs[0x421567]<br>
          emacs[0x421567]<br>
          emacs[0x42351d]<br>
          emacs[0x458015]<br>
          emacs[0x501893]<br>
          emacs[0x50465a]<br>
          emacs[0x5061dc]<br>
          emacs[0x56c85e]<br>
          emacs[0x4f7754]<br>
          emacs[0x56c7cd]<br>
          emacs[0x4f76eb]<br>
          emacs[0x4fc313]<br>
          emacs[0x4fc636]<br>
          emacs[0x41b302]<br>
          /usr/lib/libc.so.6(__libc_start_main+0xea)[0x7fcb1bf30f4a]<br>
          emacs[0x41c01a]<br>
          [1]    17259 segmentation fault (core dumped)  emacs
          --debug-init<br>
          ```</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">Is there a way to debug this?</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">I know it is not possible to invoke edebug on
          anything internal Emacs.</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">So is there any system (Linux)  solution?</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">Like system process dump or traceback.</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif"><br>
        </div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">I'm using latest version `master` branch source
          code Org-mode.</div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif">Emacs is from compiled `master` branch  source
          code too.<br>
        </div>
        <div class="gmail_default" style="font-family:trebuchet
          ms,sans-serif"><br clear="all">
        </div>
        <div>
          <div class="gmail_signature">
            <div dir="ltr">
              <div>
                <div dir="ltr">[stardiviner]           &lt;Hack this
                  world!&gt;      GPG key ID: 47C32433<br>
                  IRC(freeenode): stardiviner                    
                  Twitter:  @numbchild<br>
                  Key fingerprint = 9BAA 92BC CDDD B9EF 3B36  CB99 B8C4
                  B8E5 47C3 2433<br>
                  Blog: <a href="http://stardiviner.github.io/"
                    target="_blank" moz-do-not-send="true">http://stardiviner.github.io/</a><br>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>

--------------CEA8F5085777CF6F5394EE02--