[Test] Reproduce KT-70417

Author: demiurg906

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirBlackBoxCodegenBasedTestGenerated.java

@@ -0,0 +1,26 @@
+// IGNORE_BACKEND_K2: JVM_IR
+// ISSUE: KT-70417
+
+interface A {
+    var x: String
+}
+
+open class B : A {
+    override lateinit var x: String
+}
+
+interface C: A
+
+open class D : C  {
+    override var x: String
+        get() = "OK"
+        set(_) {}
+}
+
+class E : B(), C by D()
+
+fun box(): String {
+    val e = E()
+    e.x = "Fail"
+    return e.x
+}