From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Reuben Thomas Newsgroups: gmane.emacs.bugs Subject: bug#24640: Crashes in 25.1 Date: Sat, 8 Oct 2016 14:30:41 +0100 Message-ID: References: <83int3idxl.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a1142b9987eb335053e5a88f3 X-Trace: blaine.gmane.org 1475933502 27445 195.159.176.226 (8 Oct 2016 13:31:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 8 Oct 2016 13:31:42 +0000 (UTC) Cc: 24640@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Oct 08 15:31:38 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bsrid-0003kX-46 for geb-bug-gnu-emacs@m.gmane.org; Sat, 08 Oct 2016 15:31:15 +0200 Original-Received: from localhost ([::1]:41148 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bsrib-0000YK-N1 for geb-bug-gnu-emacs@m.gmane.org; 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charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 8 October 2016 at 06:53, Eli Zaretskii wrote: > > From: Reuben Thomas > > Date: Sat, 8 Oct 2016 00:12:26 +0100 > > > > In both cases, the crash occurs while Emacs is lazy-loading my desktop. > > What does "lazy-loading" mean in this context? > > > I can't tell exactly what it's doing, but it appears to be about the > > same place each time. > > If you run Emacs under GDB, and source the src/.gdbinit file provided > in the source tree, the backtrace command will automatically try to > produce a Lisp-level backtrace as well. That could be helpful. > > This string in the 1st backtrace you show could help figure out what > form was being evaluated: > > #41 0x000000000059af2d in read_process_output (coding=3D0x53b3920, > nbytes=3D652, chars=3D0x7fff0376eaa0 > "Unescaped left brace in regex is deprecated, passed through in regex; > marked by <-- HERE in m/\\\\begin{ > <-- HERE tex}(.*?)\\\\end{tex}/ at /usr/bin/texify line 521.\nUnescaped > left brace in regex is depre"..., p=3D0x287) > at process.c:5440 > > The SIGSEGV happens here: > > nextsym: > if (ptr->gcmarkbit) <<<<<<<<<<<<<<<<<< > break; > > So the value of 'ptr' there (frame 20 in the 1st backtrace) is of > interest. > =E2=80=8BThe current backtrace seems to have crashed at a different point, = and doesn't even include this line, but this time I've kept the gdb session running in case I can tell you anything else of =E2=80=8B =E2=80=8Binterest.=E2=80=8B --001a1142b9987eb335053e5a88f3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On 8= October 2016 at 06:53, Eli Zaretskii <eliz@gnu.org> wrote:
> From: Reuben Thomas <rrt@sc3d.org>
> Date: Sat, 8 Oct 2016 00:12:26 +0100
>
> In both cases, the crash occurs while Emacs is lazy-loading my desktop= .

What does "lazy-loading" mean in this context?

> I can't tell exactly what it's doing, but it appears to be abo= ut the
> same place each time.

If you run Emacs under GDB, and source the src/.gdbinit file provided
in the source tree, the backtrace command will automatically try to
produce a Lisp-level backtrace as well.=C2=A0 That could be helpful.

This string in the 1st backtrace you show could help figure out what
form was being evaluated:

=C2=A0 #41 0x000000000059af2d in read_process_output (coding=3D0x53b3920, n= bytes=3D652, chars=3D0x7fff0376eaa0
=C2=A0 "Unescaped left brace in regex is deprecated, passed through in= regex; marked by <-- HERE in m/\\\\begin{
=C2=A0 <-- HERE tex}(.*?)\\\\end{tex}/ at /usr/bin/texify line 521.\nUne= scaped left brace in regex is depre"..., p=3D0x287)
=C2=A0 at process.c:5440

The SIGSEGV happens here:

=C2=A0 =C2=A0 =C2=A0 nextsym:
=C2=A0 =C2=A0 =C2=A0 =C2=A0 if (ptr->gcmarkbit)=C2=A0 <<<<&l= t;<<<<<<<<<<<<<
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 break;

So the value of 'ptr' there (frame 20 in the 1st backtrace) is of interest.

=E2=80=8BThe current backtrace seems to have = crashed at a different point, and doesn't even include this line, but t= his time I've kept the gdb session running in case I can tell you anyth= ing else of =E2=80=8B
=C2=A0
=E2=80=8Binterest.=E2=80=8B
--001a1142b9987eb335053e5a88f3--