JS: fix super access to simple non-overridable properties

See KT-7653

js/js.libraries/src/js/rtti.js

@@ -22,34 +22,32 @@ Kotlin.Kind = {
 
 Kotlin.callGetter = function (thisObject, klass, propertyName) {
     var propertyDescriptor = Object.getOwnPropertyDescriptor(klass, propertyName);
-    if (propertyDescriptor != null) {
-        if (propertyDescriptor.get != null) {
-            return propertyDescriptor.get.call(thisObject);
-        }
-        else if ("value" in propertyDescriptor) {
-            return propertyDescriptor.value;
-        }
+    if (propertyDescriptor != null && propertyDescriptor.get != null) {
+        return propertyDescriptor.get.call(thisObject);
     }
-    else {
-        return Kotlin.callGetter(thisObject, Object.getPrototypeOf(klass), propertyName);
+
+    propertyDescriptor = Object.getOwnPropertyDescriptor(thisObject, propertyName);
+    if (propertyDescriptor != null && "value" in propertyDescriptor) {
+        return thisObject[propertyName];
     }
-    return null;
+
+    return Kotlin.callGetter(thisObject, Object.getPrototypeOf(klass), propertyName);
 };
 
 Kotlin.callSetter = function (thisObject, klass, propertyName, value) {
     var propertyDescriptor = Object.getOwnPropertyDescriptor(klass, propertyName);
-    if (propertyDescriptor != null) {
-        if (propertyDescriptor.set != null) {
-            propertyDescriptor.set.call(thisObject, value);
-        }
-        else if ("value" in propertyDescriptor) {
-            throw new Error("Assertion failed: Kotlin compiler should not generate simple JavaScript properties for overridable " +
-                            "Kotlin properties.");
-        }
+    if (propertyDescriptor != null && propertyDescriptor.set != null) {
+        propertyDescriptor.set.call(thisObject, value);
+        return;
     }
-    else {
-        return Kotlin.callSetter(thisObject, Object.getPrototypeOf(klass), propertyName, value);
+
+    propertyDescriptor = Object.getOwnPropertyDescriptor(thisObject, propertyName);
+    if (propertyDescriptor != null && "value" in propertyDescriptor) {
+        thisObject[propertyName] = value;
+        return
     }
+
+    Kotlin.callSetter(thisObject, Object.getPrototypeOf(klass), propertyName, value);
 };
 
 function isInheritanceFromInterface(ctor, iface) {

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -8111,6 +8111,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("propertySuperAccess.kt")
+        public void testPropertySuperAccess() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/superCall/propertySuperAccess.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("traitSuperCall.kt")
         public void testTraitSuperCall() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/superCall/traitSuperCall.kt");

js/js.translator/testData/box/superCall/propertySuperAccess.kt

@@ -0,0 +1,31 @@
+// EXPECTED_REACHABLE_NODES: 1140
+open class A {
+    val foo = "foo"
+    var bar = "bar"
+
+    open val boo = "A.boo"
+}
+
+class B : A() {
+    override val boo = "B.boo"
+
+    fun test(): String {
+        var r = ""
+        r += super.foo + ";"
+        r += super.bar + ";"
+        super.bar = "baz"
+        r += super.bar + ";"
+
+        r += super.boo + ";"
+        r += boo + ";"
+
+        return r
+    }
+}
+
+fun box(): String {
+    val r = B().test()
+    if (r != "foo;bar;baz;A.boo;B.boo;") return "fail: $r"
+
+    return "OK"
+}