Stream: deviation in typing partial function application

[DarkDimius]

dotc ./scala-scala/src/library/scala/collection/immutable/Stream.scala

./scala-scala/src/library/scala/collection/immutable/Stream.scala:1103: error: covariant type A occurs in contravariant position in type => scala.collection.immutable.Stream[A] of value st
  class LazyCell(st: => Stream[A]) {
                   ^
./scala-scala/src/library/scala/collection/immutable/Stream.scala:1222: error: missing argument for parameter n of method apply: (n: Int)A
            tlVal = tlGen()
                         ^