3 Duplicate or overlapping instance declarations
4 for `PrelBase.Eq (a, b)' at PrelTup.hi:14 and tcfail073.hs:8
7 Could not deduce `PrelBase.Eq a'
8 (arising from use of `PrelBase.==' at tcfail073.hs:8)
9 from the context: (PrelBase.Eq (a, b))
10 Probable cause: missing `PrelBase.Eq a'
11 in instance declaration context
12 When checking the methods of an instance declaration
15 Compilation had errors