[NI] Eliminate special intersection type from result type

compiler/testData/codegen/box/regressions/approximateIntersectionType.kt

@@ -0,0 +1,30 @@
+// WITH_RUNTIME
+// IGNORE_BACKEND: JS, NATIVE
+
+// FILE: First.java
+
+import java.util.List;
+import java.util.Iterator;
+
+public class First {
+    public static <A> List<A> from(List<A> var0) {
+        return null;
+    }
+}
+
+// FILE: second.kt
+
+fun <T> List<T>.listFromJava() = First.from(this)
+fun <T> List<T>.listFromKotlin() = fromKotlin(this)
+
+fun <T> fromKotlin(var0: List<T?>): List<T?> = var0
+
+fun test(a: List<Int>) {
+    val b: List<Int>? = a.listFromJava()
+    val c: List<Int?> = a.listFromKotlin()
+}
+
+fun box(): String {
+    test(listOf(1))
+    return "OK"
+}

compiler/testData/codegen/box/regressions/intersectionAsLastLambda.kt

@@ -0,0 +1,23 @@
+// IGNORE_BACKEND: JS, NATIVE
+
+// FILE: First.java
+
+public class First<T> {
+    public static <K> First<K> first(K key) {
+        return null;
+    }
+}
+
+// FILE: second.kt
+
+class Inv<T>(val key: T)
+
+fun <T, R> lastLambda(x: T, block: (T) -> R): R = block(x)
+
+fun <S> myTest(m: Inv<S>) {
+    lastLambda(m) { First.first(it.key) }
+}
+
+fun box(): String {
+    return "OK"
+}