Dragging nodes into built-in scripts causes error: "Can't drop nodes because script 'xxxx::xxxxxxx' does not inherit Node"

[mirage3d]

Godot version

v4.2.dev3.mono.official [013e8e3]

System information

Godot v4.2.dev3.mono - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 3050 Ti Laptop GPU (NVIDIA; 31.0.15.3598) - AMD Ryzen 7 5800H with Radeon Graphics (16 Threads)

Issue description

When creating and attaching a built-in script to any type of node, trying to drag nodes from the scene-tree results in an error that appears at the bottom-right of the editor, but not in the console window. The error states:

Can't drop nodes because script 'xxxxxxxx::xxxxxxx' does not inherit Node.
Even though the script clearly extends Node or any other type.

Steps to reproduce

1. Create and add any node type to the scene tree.
2. Attach a new script, choose Built-in from the dialog.
3. Save the scene first, as at the time of writing, Godot suffers from a bug that causes it to crash if the scene was not saved first.
4. Try dragging or even ctrl-dragging a node to the script.
5. Observe the error appear at the bottom-right in a yellow-accent pop-up.
6. Nod and confirm that the bug exists.

Minimal reproduction project

can't drag nodes into built-in scripts.zip

Loose files in the archive. Extract into their own folder.

[mirage3d]

Updating to add that defining @onready variables manually works fine. It's just dragging nodes into the script does not work when it is a built-in script. Also regular scripts accept node dragging fine.

[jsjtxietian]

It's because built in script didn't get compiled upon create, so the script instance's native is null. But when the drag happens, it will use script's base type to check inheritance relation, and it will fail because of null.

if (is_built_in) {
	scr->set_name(internal_name->get_text());
} else {
	String lpath = ProjectSettings::get_singleton()->localize_path(file_path->get_text());
	scr->set_path(lpath);
	Error err = ResourceSaver::save(scr, lpath, ResourceSaver::FLAG_CHANGE_PATH);
	if (err != OK) {
		alert->set_text(TTR("Error - Could not create script in filesystem."));
		alert->popup_centered();
		return;
	}
}

Add one line of scr->reload(); after scr->set_name(internal_name->get_text()); should work, but why we don't compile the built in script upon create ? I guess we don't save them because it's actually inside a scene.