-tcfail047.hs:6: The type
- `(a, (b, c))'
- cannot be used as an instance type
-
-tcfail047.hs:2: Module Main must include a definition for `Main.main'
+tcfail047.hs:7:
+ Illegal instance declaration for `A (a, (b, c))'
+ (the instance type must be of form (T a b c)
+ where T is not a synonym, and a,b,c are distinct type variables)
+
Compilation had errors