IRC channel logs

<rekado>found a reproducibility problem

<rekado>c-blosc is built with AVX2 instructions.

<rekado>this fails at runtime on the MDC cluster nodes

<rekado>python-numcodecs bundles c-blosc and has the same problem.

<rekado>I’ma fix these

<civodul>"interesting"

<civodul>great that you were able to pinpoint the issue

<rekado>maybe we could have a build phase or a lint thing that checks the sources for AVX2, SSE4, march=native, etc

<civodul>a build phase maybe

<civodul>or a compiler wrapper... but that's evil!

<efraim>Can we try to run programs with using limited CPU instructions without using qemu?

<civodul>efraim: i think qemu or specific hardware is the only way to test that

<civodul>there are bioconductor-related failures in the disarchive jobset: https://ci.guix.gnu.org/build/1649796/log/raw

<civodul>does that ring a bell?

<rekado>it often happens that right after a bioconductor upgrade people notice problems and then quickly upgrade some packages

<rekado>usually before we have fetched their sources

<rekado>so I guess I’ll have to run the upgrade once more to catch these upgraded tarballs

<civodul>horror stories

2021-11-17.log