Sporadic test errors since upgrading to Native 0.5

[armanbilge]

Most recently https://github.com/typelevel/cats/actions/runs/10556403923/job/29242594012

  [error] Error: Total 12066, Failed 0, Errors 12, Passed 12054
  [error] Error during tests:
  [error] 	cats.tests.MapSuite
  [error] 	cats.tests.ReducibleSuiteAdditional
  [error] 	cats.tests.BoundedEnumerableSuite
  [error] 	cats.tests.TraverseListSuiteUnderlying
  [error] 	cats.tests.NonEmptyAlternativeSuite
  [error] 	cats.tests.FunctorSuite
  [error] 	cats.tests.SemigroupKSuite
  [error] 	cats.tests.FunctionKLiftSuite
  [error] 	cats.tests.KleisliSuite
  [error] 	cats.tests.TupleSuite
  [error] 	cats.tests.IorSuite
  [error] 	cats.tests.WriterSuite

But this has been haunting us since we upgraded.

[danicheg]

Alright. What if we divide tests into two groups for Native build?

[armanbilge]

@danicheg Unfortunately the problem is likely a bug with MUnit or Scala Native itself. MUnit was hastily upgraded to multithreading.

[satorg]

I wonder – are there some other projects that suffer from the similar issue after upgrading to ScalaNative v5.x?
I only see it for Cats for now, but I may not be aware of all the projects around.

[satorg]

It seems that when some tests fail, they do not fail because of any particular error – they just do not start:

2024-11-14T09:18:52.7986145Z [error] Error: Total 13429, Failed 0, Errors 8, Passed 13421
2024-11-14T09:18:52.7987715Z [error] Error during tests:
2024-11-14T09:18:52.7988920Z [error] 	cats.tests.FoldableOneAndSuite
2024-11-14T09:18:52.7990196Z [error] 	cats.tests.FoldableListSuite
2024-11-14T09:18:52.7991508Z [error] 	cats.tests.ReducibleNonEmptyListSuite
2024-11-14T09:18:52.7992926Z [error] 	cats.tests.FunctionKLiftCrossBuildSuite
2024-11-14T09:18:52.7994481Z [error] 	cats.tests.AlgebraInvariantSuite
2024-11-14T09:18:52.7995762Z [error] 	cats.tests.BifoldableSuite
2024-11-14T09:18:52.7996962Z [error] 	cats.tests.PartialOrderSuite
2024-11-14T09:18:52.7998191Z [error] 	cats.tests.MonadErrorSuite

I see these errors in one of the last runs, but I cannot find any clue on what caused those failures. Those are just failed 🤷