cc001.hs:5:
- Ambiguous type variable(s)
- `aQf'
- in the constraint `PrelGHC.CCallable aQf'
+ Ambiguous type variable(s) `$0'
+ in the constraint `PrelGHC.CCallable $0'
arising from an argument in the _ccall_ to `foo', namely `(undefined ())' at cc001.hs:5