testsuite/tests/deriving/should_fail/T9968a.stderr


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T9968a.hs:8:13: error:
    • Can't make a derived instance of ‘Bifunctor Blah’:
        ‘Bifunctor’ is not a stock derivable class (Eq, Show, etc.)
        The last argument of class ‘Bifunctor’ does not have kind * or (* -> *)
    • In the data declaration for ‘Blah’