testsuite/tests/deriving/should_fail/T3834.stderr


1
2
3
4
5
6


T3834.hs:8:1:
    Can't make a derived instance of ‘C T’:
      ‘C’ is not a derivable class
      Try GeneralizedNewtypeDeriving for GHC's newtype-deriving extension
    In the stand-alone deriving instance for ‘C T’