### Godot version

4.2 f5696c3

### System information

Windows 10 x64

### Issue description

![image](https://github.com/godotengine/godot/assets/2223172/7ad0e3b6-9599-4f7b-a07c-da54779e647a)


### Steps to reproduce

1. Add node
2. Attach a built-in script
3. Add child node
4. Add script to the child node
5. In some method write `get_parent().bui`

### Minimal reproduction project

N/A
if (_debug_parse_err_line >= 0) {
		return;
	}
	ERR_FAIL_INDEX(p_level, _call_stack.stack_pos);
	int l = _call_stack.stack_pos - p_level - 1;
	GDScriptInstance *instance = _call_stack.levels[l].instance;
	if (!instance) {
		return;
	}
	Ref<GDScript> scr = instance->get_script();
	ERR_FAIL_COND(scr.is_null());
	const HashMap<StringName, GDScript::MemberInfo> &mi = scr->debug_get_member_indices();
	for (const KeyValue<StringName, GDScript::MemberInfo> &E : mi) {
		p_members->push_back(E.key);
		p_values->push_back(instance->debug_get_member_by_index(E.value.index));
	}
}
ScriptInstance *GDScriptLanguage::debug_get_stack_level_instance(int p_level) {