func-test tests still show some flakiness #5173

Your environment

Which OS do you use? up-to-date ArchLinux

Which version of GHC do you use and how did you install it? 9.14.2 from GHCup (and I have Cabal 3.18.2.0 selected in GHCup).

How is your project built (alternative: link to the project)? 793c889, but also 328b403, see below.

Which LSP client (editor/plugin) do you use? Not relevant, as I'm running tests.

Which version of HLS do you use and how did you install it? Not relevant, I'm running tests.

Have you configured HLS in any way (especially: a hie.yaml file)? I've just removed plugins/**/*.hs from the extra-source-files: stanza in haskell-language-server.cabal.

Steps to reproduce

I've run the following script 3 times, twice on 793c889 (which includes #5154) and once on 328b403 (793c889's parent, so it doesn't include #5154).

for ((i=0; i<30; ++i)); do
  ionice nice cabal run func-test -- -j32
  echo 'Attempt ############################################# ' $i
done

Expected behaviour

Tests should always pass.

Actual behaviour

Tests sometimes fail.

Here are the results of the above run when

• 793c889, take one,
• 793c889, take two,
• 328b403, take one.

Debug information