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Re: latest-from-bzr segfaults easily

From: Paul Eggert
Subject: Re: latest-from-bzr segfaults easily
Date: Wed, 25 May 2011 10:18:38 -0700
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110428 Fedora/3.1.10-1.fc14 Thunderbird/3.1.10

On 05/25/11 04:41, Jim Meyering wrote:
> The latest is not usable for me on Fedora 15, x86_64.
> How to reproduce using emacs built from the latest bzr
> sources of about 5 hours ago:
> First, get a cloned copy of the dash sources:
> (you can probably use C source file, but this is particularly reliable)
>    git clone git://git.kernel.org/pub/scm/utils/dash/dash.git && cd dash
> Then, run this and type `C-s sh_':
>   $ /p/p/emacs-2011-05-25.08h03/bin/emacs -q src/error.c
>   Fatal error (11)zsh: abort (core dumped)

I can't reproduce the problem on Fedora 14, x86_64.
I used bzr 104366 and the command:

  ~/src/gnu/emacs/trunkclone/src/emacs -q src/error.c

It could be a Fedora 15 thing, or it could be something else
different in our setups.

I recall having a similer problem on Ubuntu 10.10 that I tracked
down to a bug in the glibc string headers: they had marked memmove's
parameters to be 'restrict', which is quite bogus, and caused
GCC 4.6.0 to generate incorrect code.  Are you using GCC 4.6.0?
Maybe you should look into those headers.

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