GNU bug report logs - #41012
emacs-next does not build deterministically

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jack Hill <jackhill <at> jackhill.us>
To: bug-guix <at> gnu.org
Subject: emacs-next does not build deterministically
Date: Fri, 1 May 2020 17:13:10 -0400 (EDT)

[Message part 1 (text/plain, inline)]

Hi Guix,

For me, emacs-next does not build deterministically. Looking at the 
diffoscope output,, it looks like a lot of the difference is timestamps. 
However, some, but not all of the .elc files differ, as well as 
emacs.pdmp. I believe that emacs.pdmp is created by the new portable 
dumper.

I've tried updating to the latest emacs snapshot, 27.0.91, but that still 
had the problem. The output from the following is attatched:

$ diffoscope \
/gnu/store/g99agydlksb1xa4zjk4nx3fshpfskq0n-emacs-next-27.0.91-0.c36c5a3-check \
/gnu/store/g99agydlksb1xa4zjk4nx3fshpfskq0n-emacs-next-27.0.91-0.c36c5a3

Best,
Jack

[emacs-next-diffoscope.xz (application/x-xz, attachment)]

Message #8 received at 41012 <at> debbugs.gnu.org (full text, mbox):

From: Jack Hill <jackhill <at> jackhill.us>
To: 41012 <at> debbugs.gnu.org
Subject: Re: bug#41012: emacs-next does not build deterministically
Date: Fri, 1 May 2020 21:49:24 -0400 (EDT)

On Fri, 1 May 2020, Jack Hill wrote:

> For me, emacs-next does not build deterministically.

I should add, this is master at commit 
26e11cffb983604c813064343e41708b99072e4f

I also just tested emacs 26.3, and that also build non-deterministically.

If this is a known problem, I apologize, but I didn't see it in a search 
of the issue tracker. I suppose emacs is a difficult search term.

Best,
Jack

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