File: t7872c.check

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t7872c.scala:7: error: inferred kinds of the type arguments (List) do not conform to the expected kinds of the type parameters (type F).
List's type parameters do not match type F's expected parameters:
type A is covariant, but type _ is declared contravariant
  down(List('whatever: Object))
  ^
t7872c.scala:7: error: type mismatch;
 found   : List[Object]
 required: F[Object]
  down(List('whatever: Object))
           ^
two errors found