rust non-determinism

[Bernhard M. Wiedemann]

On 04/08/2024 18.42, John Gilmore wrote:
> "Bernhard M. Wiedemann via rb-general" wrote:
>> Via https://github.com/pop-os/launcher/issues/230
>> I finally found one big clue that points to rust's default of
>>   codegen-units = 16 as the cause.
> 
> Should the Rust documentation be improved with a patch pointing out that
> the default codegen-units setting mnakes the result not reproducible,
> (and how to fix it)?
> 
> And should a bug be filed against Rustc that their compiler defaults to
> irreproducible results, while its default should be reproducibility
> rather than slightly faster compiler runtimes?
> 
> (They could fix it by making reproducible symbols even when codegen-units
> is greater than 1, if they want both reproducibility and faster compiles.)

Yes, I can file a rust issue tomorrow.
I hope, it goes better than with sphinx, ghc and guile that only produce 
deterministic results without parallelism.

Ciao
Bernhard M.
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