testsuite/tests/ghc-regress/module/mod56.stderr


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mod56.hs:4:39:
    Can't make a derived instance of `Ix T':
      `T' must be an enumeration type
      (an enumeration consists of one or more nullary, non-GADT constructors)
        or
      `T' must have precisely one constructor
    In the data type declaration for `T'