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t7872.scala:6: error: contravariant type a occurs in covariant position in type [-a]Cov[a] of type l
type x = {type l[-a] = Cov[a]}
^
t7872.scala:8: error: covariant type a occurs in contravariant position in type [+a]Inv[a] of type l
foo[({type l[+a] = Inv[a]})#l]
^
t7872.scala:5: error: contravariant type a occurs in covariant position in type [-a]Cov[a] of type l
type l[-a] = Cov[a]
^
three errors found
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