### 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
return _debug_error;
}
int GDScriptLanguage::debug_get_stack_level_count() const {
	if (_debug_parse_err_line >= 0) {
		return 1;
	}
	return _call_stack.stack_pos;
}
int GDScriptLanguage::debug_get_stack_level_line(int p_level) const {
	if (_debug_parse_err_line >= 0) {
		return _debug_parse_err_line;
	}
	ERR_FAIL_INDEX_V(p_level, _call_stack.stack_pos, -1);
	int l = _call_stack.stack_pos - p_level - 1;
	return *(_call_stack.levels[l].line);
}
String GDScriptLanguage::debug_get_stack_level_function(int p_level) const {