path: root/test/files/neg/tcpoly_variance.scala

class A[m[x]] {
 def str: m[Object] = system.error("foo")
}

class B[m[x]] extends A[m] {
 override def str: m[String]  = system.error("foo") // since x in m[x] is invariant, ! m[String] <: m[Object]
}