Comment 12 for bug 1993334

@gabrielcocenza did some investigation and found a reproducer for the problem: https://pastebin.canonical.com/p/C9YfB9DZTk/

I'm still a little confused about what is happening. When I deploy the lma charms with juju 2.9.35 there is not problem, but this bug shows up when I redeploy with juju 2.9.36. In both cases the pylibjuju version is 3.0.1.

Here is a crashdump from 2.9.35 (without this failure): https://oil-jenkins.canonical.com/artifacts/a619937a-e7b9-4957-bac9-6bc6940ca47e/generated/generated/lma-maas/juju-crashdump-lma-maas-2022-10-26-09.34.00.tar.gz
Here is a crashdump from 2.9.36 (with this failure): https://oil-jenkins.canonical.com/artifacts/7df9a1a2-cde9-48c1-94f7-3894c01d27bd/generated/generated/lma-maas/juju-crashdump-lma-maas-2022-10-26-06.57.34.tar.gz

@gabrielcocenza will try to pin the pylibjuju version for the juju-lint charm to a stable version. This may still be a release blocker though as, unlike with juju 3.0, I think we should expect full backwards compatibility with 2.9.35.