### Godot version

Beta 17, master

### System information

Windows 11

### Issue description

Godot gets a hard crash while attempting to code-complete for member `const` of a class.

### Steps to reproduce

```GDScript
enum E { V1 }

const e := E
```

And then type a `.` after the last `E`, which triggers code hints/auto-completion for subscripts based on `E` and causes a hard crash.

Does not happen for `var e := E.V1`.

### Minimal reproduction project

See above.
if (found != nullptr) {
						err = resolve_class_inheritance(found, p_source);
					}
				}
				if (err || found == nullptr) {
					push_error(vformat(R"(Could not resolve script "%s".)", script_path), p_source);
					GDScriptParser::DataType error_type;
					error_type.kind = GDScriptParser::DataType::VARIANT;
					return error_type;
				}
				result.kind = GDScriptParser::DataType::CLASS;
				result.native_type = found->get_datatype().native_type;
				result.class_type = found;
				result.script_path = ref->get_parser()->script_path;
			} else {
				result.kind = GDScriptParser::DataType::SCRIPT;
				result.native_type = scr->get_instance_base_type();
				result.script_path = scr->get_path();
			}
			result.script_type = scr;
		} else {
			result.kind = GDScriptParser::DataType::NATIVE;
			if (result.native_type == GDScriptNativeClass::get_class_static()) {
				result.is_meta_type = true;
			}
		}
	}
	return result;
}
GDScriptParser::DataType GDScriptAnalyzer::type_from_metatype(const GDScriptParser::DataType &p_meta_type) {