Exported unnamed Node subclasses don't match anything in the node selector

[vmedea]

Tested versions

4.2-stable

System information

N/A

Issue description

With the following GDscript:

extends <SomeNode2D>

const GrowingRect = preload("growing_rect.gd")

@export var growing_rect: GrowingRect

where growing_rect.gd contains a class extending Node:

extends Node2D
...

The variable slot is successfully exported, however, it's not possible to select a node of this type in the editor inspector. The "Select a node" list remains empty, or when "Show All" is on, it's greyed out:

This is inconvenient because it forces the use of global class_name for everything that's exported, cluttering the global namespace, instead of a scene being local and self-contained.

See also #77322, however, in contrast to that more general issue, the export works fine (by manually editing the scene file), it's just the editor that doesn't show matches.

Steps to reproduce

• Open the attached minimal reproduction project
• Open "root.tscn" scene
• Select "PlayerController"
• In the inspector, remove the selected node for "GrowingRect" then go to the chooser and try to select the node again

Minimal reproduction project (MRP)

repro-anonnode.tar.gz

[kleonc]

Already fixed by #82528 (included in v4.3.dev1.official [9d1cbab] and marked for cherry-picking into future 4.2.x).

[vmedea]

Thank you, that's great news!