### 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
const GDScriptParser::GetNodeNode *get_node = nullptr;
	switch (p_subscript->base->type) {
		case GDScriptParser::Node::GET_NODE: {
			get_node = static_cast<GDScriptParser::GetNodeNode *>(p_subscript->base);
		} break;
		case GDScriptParser::Node::IDENTIFIER: {
			const GDScriptParser::IdentifierNode *identifier_node = static_cast<GDScriptParser::IdentifierNode *>(p_subscript->base);
			switch (identifier_node->source) {
				case GDScriptParser::IdentifierNode::Source::MEMBER_VARIABLE: {
					if (p_context.current_class != nullptr) {
						const StringName &member_name = identifier_node->name;
						const GDScriptParser::ClassNode *current_class = p_context.current_class;
						if (current_class->has_member(member_name)) {
							const GDScriptParser::ClassNode::Member &member = current_class->get_member(member_name);
							if (member.type == GDScriptParser::ClassNode::Member::VARIABLE) {
								const GDScriptParser::VariableNode *variable = static_cast<GDScriptParser::VariableNode *>(member.variable);
								if (variable->initializer && variable->initializer->type == GDScriptParser::Node::GET_NODE) {
									get_node = static_cast<GDScriptParser::GetNodeNode *>(variable->initializer);
								}
							}
						}
					}
				} break;
				case GDScriptParser::IdentifierNode::Source::LOCAL_VARIABLE: {
					if (identifier_node->next != nullptr && identifier_node->next->type == GDScriptParser::ClassNode::Node::GET_NODE) {
						get_node = static_cast<GDScriptParser::GetNodeNode *>(identifier_node->next);
					}
				} break;
				default: {
				} break;