-tcfail042.hs:16: Context `{PrelBase.Num taHh}'
+tcfail042.hs:16: Context `{PrelBase.Num taHz}'
required by inferred type, but missing on a type signature
- `PrelBase.Num' `taHh' arising from an instance declaration at tcfail042.hs:16
+ `PrelBase.Num taHz' arising from an instance declaration at tcfail042.hs:16
When checking superclass constraints of an instance declaration
tcfail042.hs:4: Module Main must include a definition for `Main.main'