testsuite/tests/deriving/should_fail/deriving-via-fail2.stderr


1
2
3
4
5
6


deriving-via-fail2.hs:7:1: error:
    • Cannot derive instance via ‘Maybe’
        Class ‘C’ expects an argument of kind ‘*’,
        but ‘Maybe’ has kind ‘* -> *’
    • In the stand-alone deriving instance for ‘C A’