Open mkoeppe opened 10 months ago
@tobiasdiez You already reacted in https://github.com/sagemath/sage/pull/36505#issuecomment-1779293008, but perhaps you could try to explain what you intended with the settings in https://github.com/sagemath/sage/blob/develop/src/tox.ini#L262 regarding multiprocessing.
This adds support for multiprocessing. Otherwise codecov doesn't collect any coverage in sub-threads.
We also see these messages in large quantities the Build & Test CI runs, in the section "Prepare coverage results". For example https://github.com/sagemath/sage/actions/runs/6623852735/job/17991733088#step:19:20
This one also shows up in the CI, for example https://github.com/sagemath/sage/actions/runs/6606391152/job/17942563622#step:19:1162, but with much less frequency.
This looks to me like a concurrency bug. It may, in fact, help explain the nondeterministic coverage results that we observed even after fixing the random seed. See #35522.
Originally posted by @mkoeppe in https://github.com/sagemath/sage/issues/36505#issuecomment-1777824058