Invalid call. Nonexistent function 'new' in base 'Nil'. if you use @export_group with same class name

[Ughuuu]

Godot version

4.0 RC 3

System information

Macbook m1

Issue description

If I normally use:

Skeleton2D.new()

if works.

If I use:

@export_group("Skeleton2D")
...
Skeleton2D.new()

I get error: Invalid call. Nonexistent function 'new' in base 'Nil'.

Steps to reproduce

• Run a script where you have @export_group with same name as a node class name that you use .new() on.

extends Node2D
class_name Test

@export_group("Skeleton2D")

# Called when the node enters the scene tree for the first time.
func _ready():
	var skeleton = Skeleton2D.new()


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	pass

Minimal reproduction project

BugNew.zip

[anvilfolk]

Behavior present in all RCs.

I believe that the script is checking for its own properties, and export group is effectively exporting a property named Skeleton2D. This will shadow the global Skeleton2D. I'm not certain that I'd consider this a bug necessarily, but perhaps at least a warning when @export_group shadows a global name?

[YuriSizov]

Reopening because #73870 has been reverted.

[Shadowblitz16]

I run into this when exporting a group called Input and then I couldn't use the engine Input singleton

[YuriSizov]

There is no need to bump this, this is a known and confirmed issue.