testsuite/tests/typecheck/should_fail/T15883e.stderr


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T15883e.hs:16:1:
     Can't make a derived instance of
        ‘Data (Foo ('BoxedRep 'Lifted))’ with the stock strategy:
        Don't know how to derive ‘Data’ for type ‘forall a. a’
     In the stand-alone deriving instance for
        ‘Data (Foo (BoxedRep Lifted))’