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bug#11717: 24.1.50; Segmentation fault in Fdelete_other_windows_internal
From: |
Eli Zaretskii |
Subject: |
bug#11717: 24.1.50; Segmentation fault in Fdelete_other_windows_internal when running Gnus unit tests |
Date: |
Fri, 15 Jun 2012 21:29:49 +0300 |
> From: David Engster <deng@randomsample.de>
> Date: Fri, 15 Jun 2012 20:11:36 +0200
>
> The recipe to reproduce this bug involves running the Gnus unit tests
> from its git repository. I can narrow it down further if needed, but I'm
> hoping that the backtraces are enough to fix this problem. Please note
> that this problem also affects the current 24.1 stable release, but I
> used latest Emacs from bzr for acquiring the gdb backtraces.
>
> Recipe:
>
> * Get Gnus from git: git clone http://git.gnus.org/gnus.git
>
> * Do: ./configure, make, make check
>
> * You'll see something like the following (the tests run completely in
> batch mode!):
>
> ---------- snip
> ***** Using /tmp/gnus-test-22112bP3 as temporary Gnus home.
> ***** Firing up Gnus; connecting to Gmane.
> [... further output snipped ...]
> ***** Reading active from gmane.discuss.
> Changed level of gmane.discuss from 3 to 1
> Fatal error (11)zsh: segmentation fault /opt/emacs-debug/bin/emacs -batch -q
> -no-site-file -l ./dgnushack.el -l ert -
> ---------- snip
>
> * The unit test where this is crashing is the NNTP test, which can be
> seen in lisp/tests/gnustest-nntp.el. You can browse it here:
>
>
> http://git.gnus.org/cgit/gnus.git/tree/lisp/tests/gnustest-nntp.el?id=aff68f906d8726a6a29edad4a20f253f8bcdf644
>
> The crash happens when this test code calls
>
> (gnus-group-select-group 5)
>
>
> Further information:
>
> * Emacs was built using gcc 4.7 and the following options:
>
> CFLAGS="-g -O0" ./configure --enable-asserts --without-gconf
> --without-gsettings --without-dbus --prefix=/opt/emacs-debug
>
> * Backtraces from gdb:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x080b9d2e in Fdelete_other_windows_internal (window=139160437,
> root=139572509) at window.c:2650
> 2650 hlinfo = MOUSE_HL_INFO (f);
>
> #0 0x080b9d2e in Fdelete_other_windows_internal (window=139160437,
> root=139572509) at window.c:2650
This is a duplicate of 11677. I asked there to find out which parts
of MOUSE_HL_INFO cause the segfault, and also perhaps provide a
simpler test case. Can you do that?
TIA