Improve error message in deriving( Functor )
[ghc.git] / testsuite / tests / typecheck / should_fail / tcfail197.stderr
1
2 tcfail197.hs:5:8: error:
3     • Illegal polymorphic type: forall a. a
4       GHC doesn't yet support impredicative polymorphism
5     • In the type signature:
6         foo :: [forall a. a] -> Int