KT-1417 & KT-1398 proper access flags for backing fields

compiler/backend/src/org/jetbrains/jet/codegen/ClassBodyCodegen.java

@@ -112,7 +112,14 @@ public abstract class ClassBodyCodegen {
 
                     //noinspection ConstantConditions
                     if (!(kind instanceof OwnerKind.DelegateKind) && state.getBindingContext().get(BindingContext.BACKING_FIELD_REQUIRED, propertyDescriptor)) {
-                        v.newField(p, Opcodes.ACC_PRIVATE, p.getName(), state.getTypeMapper().mapType(propertyDescriptor.getOutType()).getDescriptor(), null, null);
+                        int modifiers = JetTypeMapper.getAccessModifiers(propertyDescriptor, 0);
+                        if (!propertyDescriptor.isVar()) {
+                            modifiers |= Opcodes.ACC_FINAL;
+                        }
+                        if(state.getStandardLibrary().isVolatile(propertyDescriptor)) {
+                            modifiers |= Opcodes.ACC_VOLATILE;
+                        }
+                        v.newField(p, modifiers, p.getName(), state.getTypeMapper().mapType(propertyDescriptor.getOutType()).getDescriptor(), null, null);
                     }
                 }
             }

compiler/testData/codegen/regressions/kt1398.kt

@@ -0,0 +1,7 @@
+open class Base(val bar: String)
+
+class Foo(bar: String) : Base(bar) {
+  fun something() = (bar as java.lang.String).toUpperCase()
+}
+
+fun box() = Foo("ok").something()

compiler/testData/codegen/regressions/kt1417.kt

@@ -0,0 +1,9 @@
+package pack
+
+open class A(val value: String )
+
+class B(value: String) : A(value) {
+    fun toString() = "B($value)";
+}
+
+fun box() = if (B("4").toString() == "B(4)") "OK" else "fail"

compiler/tests/org/jetbrains/jet/codegen/PropertyGenTest.java

@@ -205,4 +205,12 @@ public class PropertyGenTest extends CodegenTestCase {
     public void testKt1159() throws Exception {
         blackBoxFile("regressions/kt1159.kt");
     }
+
+    public void testKt1417() throws Exception {
+        blackBoxFile("regressions/kt1417.kt");
+    }
+
+    public void testKt1398() throws Exception {
+        blackBoxFile("regressions/kt1398.kt");
+    }
 }