Unexpected output on stderr:
Without metaclass does not implement 'attributes'.
Unexpected output on stderr:
[./test/language/class/attributes/without line 4] in <script>
Expected return code 0 and got 70. Stderr:
Without metaclass does not implement 'attributes'.
[./test/language/class/attributes/without line 4] in <script>

Missing expected output "true" on line 4.