SIGNAL 11 Segmentation fault

Now that we have recent binaries of HashLink for linux at https://github.com/HaxeFoundation/hashlink/releases/download/latest/hashlink-a505e25-linux-amd64.tar.gz I enabled unit testing for some libraries against HashLink via GitHub Actions.

Unfortunately HashLink crashes repeatedly somewhere in the middle of the tests (involving threading I guess).

```
SIGNAL 11
Segmentation fault (core dumped)
Error: Process completed with exit code 139.
```

See https://github.com/vegardit/haxe-concurrent/actions/runs/4015485217/jobs/6897266435#step:15:439

Unfortunately I cannot reproduce this locally. I also tried to run the GitHub workflow locally using https://github.com/nektos/act but HashLink doesn't crash there either.

Any ideas how to get closer to the root of this?