### 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
} else {
			arghint += par->identifier->name.operator String() + ": " + par->get_datatype().to_string();
		}
		if (par->initializer) {
			String def_val = "<unknown>";
			switch (par->initializer->type) {
				case GDScriptParser::Node::LITERAL: {
					const GDScriptParser::LiteralNode *literal = static_cast<const GDScriptParser::LiteralNode *>(par->initializer);
					def_val = literal->value.get_construct_string();
				} break;
				case GDScriptParser::Node::IDENTIFIER: {
					const GDScriptParser::IdentifierNode *id = static_cast<const GDScriptParser::IdentifierNode *>(par->initializer);
					def_val = id->name.operator String();
				} break;
				case GDScriptParser::Node::CALL: {
					const GDScriptParser::CallNode *call = static_cast<const GDScriptParser::CallNode *>(par->initializer);
					if (call->is_constant && call->reduced) {
						def_val = call->function_name.operator String() + call->reduced_value.operator String();
					}
				} break;
				case GDScriptParser::Node::ARRAY: {
					const GDScriptParser::ArrayNode *arr = static_cast<const GDScriptParser::ArrayNode *>(par->initializer);
					if (arr->is_constant && arr->reduced) {
						def_val = arr->reduced_value.operator String();
					}
				} break;
				case GDScriptParser::Node::DICTIONARY: {
					const GDScriptParser::DictionaryNode *dict = static_cast<const GDScriptParser::DictionaryNode *>(par->initializer);
					if (dict->is_constant && dict->reduced) {
						def_val = dict->reduced_value.operator String();