Add test on obsolete issue

#KT-9203 Obsolete

compiler/testData/diagnostics/tests/generics/kt9203_1.kt

@@ -0,0 +1,18 @@
+public interface Collector<T, R>
+
+class A<out T> {
+    fun foo(): T = null!!
+}
+
+public fun <T> toList(): Collector<T, A<T>> = null!!
+
+interface Stream<T> {
+    public fun <R> collect(collector: Collector<in T, R>): R
+}
+fun stream(): Stream<String> = null!!
+
+fun main(args: Array<String>) {
+    val stream: Stream<String> = stream()
+    val xs = stream.collect(toList())
+    xs.foo()
+}