tcfail073.hs:3:
Duplicate or overlapping instance declarations
for `Eq (a, b)'
- imported from module `PrelTup' and defined at tcfail073.hs:7
+ defined at tcfail073.hs:7 and imported from module `PrelTup'
tcfail073.hs:8:
- Could not deduce `Eq a'
- (arising from use of `==' at tcfail073.hs:8)
- from the context: (Eq (a, b))
+ Could not deduce `Eq a' from the context: (Eq (a, b))
Probable cause: missing `Eq a' in instance declaration context
- When checking the methods of an instance declaration
+ arising from use of `==' at tcfail073.hs:8
+ In the right-hand side of an equation for `==': m == o
Compilation had errors