If an application is crashing during a github actions run then you can use this guide to capture the core as an artifact for debugging.
This guide was developed to debug Mac crashes specifically. It should mostly apply to Linux as well but getting dumps from Windows is unknown for now.
By default these systems will not be in a state where they are recording core dumps, and even when enabled you need to run with elevated permissions for a core to even be written. To capture dumps you need to do the following: