testsuite/tests/deriving/should_fail/T9600.stderr


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T9600.hs:3:39: error:
    Can't make a derived instance of ‘Applicative Foo’:
      ‘Applicative’ is not a stock derivable class (Eq, Show, etc.)
      Try GeneralizedNewtypeDeriving for GHC's newtype-deriving extension
    In the newtype declaration for ‘Foo’