### Godot version

4.0 beta 10

### System information

Windows 10

### Issue description

Godot crashes when i accidently name 2 items in an enum the same

EDIT:
The editor freeze for some seconds, then both editor- and console-window dissapear

### Steps to reproduce

Write

```gdscript
enum {
    A,
}
```

and then add a second line with another A:

```gdscript
enum {
    A,
    A # <- crash
}
```

Does not always immediatly happen if i copy&paste items.
Does not happen when i change the script in another editor and open the script in Godot.

### Minimal reproduction project

[enum.zip](https://github.com/godotengine/godot/files/10313759/enum.zip)

ERR_FAIL_NULL(p_node);
	ERR_FAIL_NULL(p_list);
	if (p_list->find(p_node) != nullptr) {
		return;
	}
	p_list->push_back(p_node);
	
	
	if (p_node->base_type.class_type != nullptr) {
		get_class_node_current_scope_classes(p_node->base_type.class_type, p_list);
	}
	if (p_node->outer != nullptr) {
		get_class_node_current_scope_classes(p_node->outer, p_list);
	}
}
Error GDScriptAnalyzer::resolve_class_inheritance(GDScriptParser::ClassNode *p_class, const GDScriptParser::Node *p_source) {