[Pkg-rust-maintainers] Bug#1147372: Bug#1147372: Bug#1147372: rust-coreutils regressed in reproducibility

[Sylvestre Ledru]

Le 17/10/2026 à 13:03, Jochen Sprickerhof a écrit :
> Hi Paul,
>
> * Paul Gevers <elbrus at debian.org> [2026-10-17 09:41]:
>> On Fri, 11 Sep 2026 15:08:21 +0200 =?UTF-8?Q?Fabian_Gr=C3=BCnbichler?=
>> <lists at fabian.gruenbichler.email> wrote:
>>> On Fri, Sep 11, 2026, at 2:22 PM, Sylvestre Ledru wrote:
>>>> Le 11/09/2026 à 14:16, Jochen Sprickerhof a écrit :
>>>>>> How can i work around this?
>>>>> By reverting the change. I am not aware of a way to make PGO >>
>>> reproducible.
>>>
>>> this probably warrants some broader discussion..
>>>
>>> I think the only way to implement PGO and reproduciblity is to treat
>>> the profiles as allowed generated input to the build (i.e., lift the
>>> restriction of "all pre-generated parts of the upstream source must be
>>> regenerated as part of the build" for them).
>> So, how to move forward? This feels a bit like the community behind
>> reproducible builds should paper out a general solution to deal with
>> PGO in binary distributions, which is unlikely to happen overnight. Do
>> we agree on that? If so, I think we should let rust-coreutils migrate
>> now.
> Well, the other option is to revert enabling PGO. But as reproducible
> builds are still kind of new I would be fine with letting rust-coreutils
> migrate for trixie and discuss other options after the release.

Given the important performance wins, I am not interested in disabling PGO.

What should be the procedures to get an exception for this? thanks!

Just an email to release management ?

>> Which also means that we should ensure "this probably warrants some
>> broader discussion". I have the impression that's somewhat already
>> happening, but I've only seen it on IRC. Can somebody link to broader
>> discussion (if it exists already)?
> There is:
>
> https://lists.reproducible-builds.org/pipermail/rb-general/2026-September/004153.html

I proposed a PR 
https://github.com/bmwiedemann/theunreproduciblepackage/tree/master/pgo
to document this a bit more :)

S