I'm still learning how to read these nightly reports (potentially a good
discussion/demo topic for a weekly meeting or deep-dive?). When I click
into the failure on last night's run, the GitHub status icon is spinning
as though it's still running, and there's no clear indication of what
failed. Do others see the same thing?
Yes, I see that too, and I've seen it before. I believe that means GitHub did not properly "reap" the runner running this job.
I can't find the reference for it now, but I recall reading in GitHub Docs that a runaway runner can happen due to your job pegging the VM's CPU or using up all its RAM, since there is a small process in the VM that's responsible for reporting its state to GitHub. It could also be entirely GitHub's fault.