Description
Attempt at fixing and more analysis: #27.
While working on PR #23, it turned out that the test runner never finished, leading to empty logs (while running or after canceling). The bad behavior of the Github reporting is explained here: actions/runner#1326 (and it was closed with no fix).
The cause appears to be a (potential) race condition. It is yet unclear whether that is caused by the resumable code or something else. The temporary solution in #23 is to disable parallel runs in CI and to improve reporting.
Unfortunately, xUnit reporting is quite useless for cases like this. It only reports when a test has finished, not when it started. While dotnet run has a --blame-hang-timeout, which at least solves the issue with GH action reporting, as at the very least, this results in a failed test run.
Opening this issue to investigate further, so that we can close #23 meanwhile, as the implementations there have nothing to do with this behavior (removing enough tests removes the issue, but it doesn't matter which ones you remove, ultimately, the race condition comes back).
Example of a run that went on for over 5 hours (!): https://github.com/abelbraaksma/TaskSeq/actions/runs/3250819154/jobs/5334999458 (note: after retention period is over, this log will be gone).