Object's set_meta() doesn't work on inherited scenes

[kubecz3k]

Operating system or device, Godot version, GPU Model and driver (if graphics related):
6277e6d

Issue description:
I'm writing an editor tool in which I would like to save some informations inside the scene itself. It turns out I can't save any information inside those scenes which are extending another ones.

Steps to reproduce:
Short way:

1. Download sample project
2. open InheritedScene.tscn
3. Save it.
4. Check InheritedScene.tscn in notepad and see that there is no meta data
5. Additional: Repeat above steps for BaseScene.tscn and see meta is saved inside BaseScene.tscn

Long way:

1. Create BaseScene.tscn
2. Create scene which is inheriting BaseScene.tscn save it as InheritedScene.tscn
3. Attach this code to InheritedScene.tscn:

tool
extends Node
func _ready():
	set_meta("Custom Meta", "Meta informations: " +  get_name() + " save time: " + str(OS.get_time()));

4. Reopen InheritedScene.tscn
5. Save it
6. Open InheritedScene.tscn in notepad and see that there is no meta data

Link to minimal example project:
MetaInfoSaveInInheritedSceneTool.zip

[fracteed]

Good to see that you have isolated the issue! I was having lots of trouble reading metadata via the get_meta function a few weeks back on my game. Now I realise why I was getting all the errors :)

[kubecz3k]

I also suspect this issue is related with #12838

[Piet-G]

Tested in Master, the meta still won't get added.

[akien-mga]

For the reference, I checked if #32416 would fix this issue, but it did not.

[blaze-the-star]

2 Years later and this error still persists.

[eh-jogos]

Having problems with this as well, on 3.3

[Jayman2000]

A side effect of this bug is that Editor Descriptions can’t be set for inherited scenes.

[Rubonnek]

I'm not able to reproduce this issue in the 3.x branch at commit a75afd6

[Calinou]

Closing per @Rubonnek's comment. Please comment if you can still reproduce this.