### 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
counter(p_counter) {
		(*counter)++;
	}
	~RecursionCheck() {
		(*counter)--;
	}
};
static bool _guess_identifier_type(GDScriptParser::CompletionContext &p_context, const GDScriptParser::IdentifierNode *p_identifier, GDScriptCompletionIdentifier &r_type);
static bool _guess_identifier_type_from_base(GDScriptParser::CompletionContext &p_context, const GDScriptCompletionIdentifier &p_base, const StringName &p_identifier, GDScriptCompletionIdentifier &r_type);
static bool _guess_method_return_type_from_base(GDScriptParser::CompletionContext &p_context, const GDScriptCompletionIdentifier &p_base, const StringName &p_method, GDScriptCompletionIdentifier &r_type);
static bool _is_expression_named_identifier(const GDScriptParser::ExpressionNode *p_expression, const StringName &p_name) {
	if (p_expression) {
		switch (p_expression->type) {
			case GDScriptParser::Node::IDENTIFIER: {
				const GDScriptParser::IdentifierNode *id = static_cast<const GDScriptParser::IdentifierNode *>(p_expression);
				if (id->name == p_name) {
					return true;
				}
			} break;
			case GDScriptParser::Node::CAST: {
				const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
				return _is_expression_named_identifier(cn->operand, p_name);
			} break;
			default:
				break;
		}
	}
	return false;
}
static bool _guess_expression_type(GDScriptParser::CompletionContext &p_context, const GDScriptParser::ExpressionNode *p_expression, GDScriptCompletionIdentifier &r_type) {