path: root/testsuite/tests/gadt/CasePrune.stderr

CasePrune.hs:14:31:
    Can't make a derived instance of ‛C A’
      (even with cunning newtype deriving):
      it is not type-safe to use GeneralizedNewtypeDeriving on this class;
      ‛ic’, at type ‛T a’, cannot be converted safely
    In the newtype declaration for ‛A’