testsuite/tests/module/mod56.stderr


1
2
3
4
5
6
7
8


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 declaration for ‛T’