-tcfail019.hs:19: No instance for: `B [tamO]'
- arising from an instance declaration at tcfail019.hs:19
- When checking methods of an instance declaration
+tcfail019.hs:19:
+ Could not deduce `C [a]'
+ (arising from an instance declaration at tcfail019.hs:19)
+ from the context ()
+ Probable cause: missing `C [a]' in instance declaration context
+ or missing instance declaration for `C [a]'
+ When checking the superclasses of an instance declaration
-tcfail019.hs:19: No instance for: `C [tamO]'
- arising from an instance declaration at tcfail019.hs:19
- When checking methods of an instance declaration
-
-tcfail019.hs:19: No instance for: `B [tamO]'
- arising from an instance declaration at tcfail019.hs:19
- When checking superclass constraints of an instance declaration
-
-tcfail019.hs:19: No instance for: `C [tamO]'
- arising from an instance declaration at tcfail019.hs:19
- When checking superclass constraints of an instance declaration
+tcfail019.hs:19:
+ Could not deduce `B [a]'
+ (arising from an instance declaration at tcfail019.hs:19)
+ from the context ()
+ Probable cause: missing `B [a]' in instance declaration context
+ or missing instance declaration for `B [a]'
+ When checking the superclasses of an instance declaration
+
Compilation had errors