tests: remove extra_files.py (#12223)
[ghc.git] / testsuite / tests / typecheck / should_fail / tcfail086.hs
1 {-# LANGUAGE ExistentialQuantification #-}
2
3 -- !!! Check that we can't derive instances of existential types
4 module ShouldFail where
5
6 data Ex = forall a. Ex [a] deriving( Eq )
7