Add test for KT-52580

compiler/testData/codegen/box/safeCall/kt52580.kt

@@ -0,0 +1,32 @@
+// ISSUE: KT-52580
+
+interface Base {
+    val a: String
+}
+
+interface Derived : Base {
+    override val a: String
+    val b: Int
+}
+
+class BaseImpl(override val a: String) : Base
+
+fun test(base: Base): String {
+    return consume(
+        base.run { a },
+        (base as? Derived)?.b?.toString(),
+        base.a
+    )
+}
+
+fun consume(s1: String, s2: String?, s3: String): String {
+    return "$s1|$s2|$s3"
+}
+
+fun box(): String {
+    val result = test(BaseImpl("Base"))
+    return when (result) {
+        "Base|null|Base" -> "OK"
+        else -> "Fail: $result"
+    }
+}