/kt45461.kt:5:25: warning: parameter 'foo' is never used
    fun <S : T> takeFoo(foo: Foo<in S>) {}
                        ^
/kt45461.kt:10:19: warning: type argument for a type parameter S can't be inferred because it has incompatible upper bounds: String, Int. This will become an error in Kotlin 1.9
    Bar<String>().takeFoo(foo) // error in 1.3.72, no error in 1.4.31
                  ^
