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Re: Preview: portable dumper

From: Robert Pluim
Subject: Re: Preview: portable dumper
Date: Tue, 20 Feb 2018 20:01:00 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.91 (gnu/linux)

Robert Pluim <address@hidden> writes:

> Daniel Colascione <address@hidden> writes:
>> On 02/20/2018 10:09 AM, Robert Pluim wrote:
>> What on earth? I mean, we're instructing the compiler to assume
>> something that's both trivial and true. What GCC version is this? If
>> it's recent, I think it's probably worth reporting.
> $ gcc --version
> gcc-5.real (Ubuntu 5.4.0-6ubuntu1~16.04.6) 5.4.0 20160609
> I have a gcc-8-ish somewhere that I can rev up to see if it has the
> same problem, but probably not soon.

That gcc-8 turned out to be easy to get ready, and it shows the same
problem (and solution). So now I have an alpha branch of emacs being
allegedly miscompiled by a non-released tip-of-tree version of gcc, in
a feature that messes around with the guts of Emacs' object

I find it hard to assign blame here. Should I start using unreleased
binutils next? :-)


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