ghc/tests/typecheck/should_fail/tcfail073.stderr

   1
   2 tcfail073.hs:3:
   3     Duplicate or overlapping instance declarations
   4         for `Eq (a, b)' at PrelTup.hi:58 and tcfail073.hs:8
   5
   6 tcfail073.hs:8:
   7     No instance for: `Eq a'
   8         arising from use of `==', at tcfail073.hs:8
   9         Available context: ()
  10         From the superclasses of the instance declaration
  11
  12
  13 Compilation had errors