Unexpected error:
[./test/language/class/attributes/duplicate_keys line 3] Error at '#': Expected expression.
Expected return code 0 and got 65. Stderr:
[./test/language/class/attributes/duplicate_keys line 3] Error at '#': Expected expression.

Missing expected output "1" on line 9.
Missing expected output "3" on line 10.
Missing expected output "[null, value, other]" on line 11.