Post by der Mondhase in 8-Colors Star Guardians comments

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Hi, developer replying here. I wasn't aware of these issues, as they didn't trigger in my editor build, but I wouldn't be surprised if something unexpected happens in the standalone/exported version. I will actively investigate the crashes. Can you pinpoint any specific action that seemed to trigger the crashes more often?

EDIT: I'm trying to reproduce the crashes, but so far without success. I have been testing mostly story mode in the Windows downloadable version and currently running through it again. Did you play with the default settings? In case, it would help if you could you send me/link me the files in the path:

%appdata%\Godot\app_userdata\8colorsSentaiProject\logs

Deleted account1 year ago

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der Mondhase1 year ago

Thank you very much, I see an interesting crash report in your logs:

USER ERROR: Condition "slot >= slot_max" is true. Returning: nullptr    at: get_instance (./core/object/object.h:972)

This is 100% the cause of the crash, though I cannot cause it to happen on my PC consistently. Apparently, it has something to do with a known bug in Godot 4.0. I will try to use one of the workarounds I found in the documentation and report back.

Did the crash happen mostly between scene transitions?

der Mondhase1 year ago (1 edit)

UPDATE: I could reproduce the crashes, if they happen at scene change. Godot crashes without showing any error, the one I thought to be responsible was a red herring, so I assume it must be an unlogged bug.

I might have pinpointed the cause of the error in the cleanup code on scene change. I have updated the build accordingly, see: https://dermondhase.itch.io/8-colors-sentai/devlog/538042/solving-some-underhand...

Solenya188 days ago (1 edit)

Hey there, i am also having the exact same error on logs from people that tried my demo and had random crash when scene transitioning (can't reproduce the crash myself). Using 4.0 too. What was the cause of this error for your case and how did you fix it?

Andrea "Jens" Demetrio187 days ago (1 edit) (+1)

Hi, I am replying from my other account. It was a bug solved in Godot 4.2 related to change_scene. If you can't upgrade, the way to fix it is to avoid using the built-in change_scene and instead have a main scene with a parent Node and your current scene as a child. When you change scene, you delete the child normally and then swap it with the newly loaded scene that should replace it. This solved the issue in Godot 4.0 for me!

Please do note that this bug ONLY happens in release versions and NOT in Debug/in-editor versions!

Solenya187 days ago(+1)

Thank you very much! I will try these.

Your game looks cool btw!

Andrea "Jens" Demetrio187 days ago(+1)

My pleasure. Let me know if you still have troubles, worst case scenario I can simply show you my code!

Here's how I set up my project: SceneManager is a singleton that implements the goto_scene method. When the method is called, it emits a signal "switch_scene" which is wired to another goto_scene function in the MasterScene object. The MasterScene then frees the current scene (the only child) and instantiates a new child with the required scene type.

I hope this helps!

Solenya186 days ago

Damn that's really helpful. I tried upgrading to 4.2 but got some little issues so i will probably use your method instead. Thanks a ton!

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