tcfail042.hs:15:
- Could not deduce `Num a'
- (arising from an instance declaration at tcfail042.hs:15)
- from the context: (Eq a, Show a)
+ Could not deduce `Num a' from the context: (Eq a, Show a)
Probable cause: missing `Num a' in instance declaration context
- When checking the superclasses of an instance declaration
+ arising from an instance declaration at tcfail042.hs:15
Compilation had errors