-
-tcfail017.hs:11: No instance for: `C [takz]'
- arising from an instance declaration at tcfail017.hs:11
- When checking superclass constraints of an instance declaration
-
-Compilation had errors
+tcfail017.hs:10:
+ Could not deduce `C [a]' from the context (B a)
+ Probable fix:
+ Add `C [a]' to the instance declaration context
+ Or add an instance declaration for `C [a]'
+ arising from an instance declaration at tcfail017.hs:10