It seems you are experiencing a segmentation fault when using the spine-godot GDExtension with GitHub Actions. This issue could be related to the specific configuration or environment setup in your GitHub Actions workflow. To troubleshoot, ensure that your GitHub Actions workflow is correctly set up to build the Godot editor and export templates as described in the spine-godot Runtime Documentation. Make sure you are using the correct Godot version and that all dependencies are properly installed. Additionally, verify that the workflow is correctly triggering the appropriate build scripts and that the environment variables are set as needed.

If the problem persists, consider testing the build process locally to see if the issue is specific to the GitHub Actions environment. This can help identify if there are any discrepancies between your local setup and the GitHub Actions configuration.

I'm afraid the info you provided is not enough to fix this. Can you possibly provide a GitHub repo with the workflow you posted, that reproduces the issue? The screenshot of the log also doesn't say anything about the spine-godot extension.