### Godot version

4.0.2

### System information

Ubuntu 22.04.1 LTS

### Issue description

So far I've found these ones:

![Screenshot from 2023-05-10 17-56-42](https://github.com/godotengine/godot/assets/85438892/b161b14a-cb7d-46fe-8398-816bf354a929)
![Screenshot from 2023-05-10 18-01-02](https://github.com/godotengine/godot/assets/85438892/b0fefcfb-4246-4ebb-ae7b-dd798d7a1d63)

But there are likely more like them. They are invalid, at least in the context I encountered them here (at the beginning of a regular line of script)

### Steps to reproduce

Type `Anchor` in the code editor.

### Minimal reproduction project

N/A
return OK;
					}
				} else {
					List<StringName> utility_functions;
					Variant::get_utility_function_list(&utility_functions);
					if (utility_functions.find(p_symbol) != nullptr) {
						r_result.type = ScriptLanguage::LOOKUP_RESULT_CLASS_TBD_GLOBALSCOPE;
						r_result.class_name = "@GlobalScope";
						r_result.class_member = p_symbol;
						return OK;
					}
				}
			}
		} break;
		case GDScriptParser::COMPLETION_ATTRIBUTE_METHOD: {
			is_function = true;
			[[fallthrough]];
		}
		case GDScriptParser::COMPLETION_ATTRIBUTE: {
			if (context.node->type != GDScriptParser::Node::SUBSCRIPT) {
				break;
			}
			const GDScriptParser::SubscriptNode *subscript = static_cast<const GDScriptParser::SubscriptNode *>(context.node);
			if (!subscript->is_attribute) {
				break;
			}
			GDScriptCompletionIdentifier base;
			bool found_type = _get_subscript_type(context, subscript, base.type);
			if (!found_type && !_guess_expression_type(context, subscript->base, base)) {
				break;