`bandwhich` broken in jobset but can't reproduce locally

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I got a new Macbook for work and I’m trying to fix some of the Darwin builds for the upcoming release. bandwhich for example is broken currently in Hydra - Build 143686847 of job nixpkgs:trunk:bandwhich.x86_64-darwin

and it fails with panics in tests. The problem is that I can’t reproduce this on my own Intel MBP, even if I check out the same revision 2987d66d0f92f58b79db4dc687d3a56f71f0f157 (from the cached failure).

At this point I’m a bit unsure what to do next and was wondering if anyone had experience with this?

TL;DR: bandwhich fails in hydra but not locally on same architecture and revision

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Not sure why you’re not getting the same test failures, but there is an issue complaining about similar errors: Aattempted to leave type uninitialized, which is invalid · Issue #216 · imsnif/bandwhich · GitHub. So there seems to be an upstream bug (outdated dependencies) either way.