Install returns error code 255 in CI/CD

[BenBenBenB]

When building my project via Github Actions, the install fails with error code 255 returned. I set up an example in this repo.

I am running godot --headless -s plug.gd install production in the workflow which is running on Ubuntu.

Example output from a failed workflow: https://github.com/BenBenBenB/godot-cicd-test/actions/runs/10549781403/job/29225223972

Run godot --headless -s plug.gd install production
Godot Engine v4.3.stable.official.77dcf97d8 - https://godotengine.org/

Installing...
Installing plugin Godot-StateMachineNodes...
Downloading Godot-StateMachineNodes from ***github.com/ninstar/Godot-StateMachineNodes.git...
Successfully download Godot-StateMachineNodes
Installing files for Godot-StateMachineNodes...
Installed 9 files for Godot-StateMachineNodes
Finished, elapsed 0.692s
Error: Process completed with exit code 255.

I am assuming a -1 is returned and cast as an unsigned int8 to become 255.

I made it work in my projects by adding request_quit(0) to the end of _finalize(), but I feel there may be a more elegant way to exit execution.

• The change: https://github.com/BenBenBenB/godot-cicd-test/commit/ddcbdda788f0903256f5f8570f0c00ce36461ada
• The successful pipeline: https://github.com/BenBenBenB/godot-cicd-test/actions/runs/10549817571