Fix for KT-6312: Compiler crashes accessing inherited property of class object

#KT-6312 Fixed

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

@@ -698,12 +698,16 @@ public class AsmUtil {
     }
 
     public static boolean isInstancePropertyWithStaticBackingField(@NotNull PropertyDescriptor propertyDescriptor) {
-        DeclarationDescriptor containingDeclaration = propertyDescriptor.getContainingDeclaration();
-        return isObject(containingDeclaration) || isPropertyWithBackingFieldInOuterClass(propertyDescriptor);
+        if (propertyDescriptor.getKind() == CallableMemberDescriptor.Kind.FAKE_OVERRIDE) {
+            return false;
+        }
+
+        return isObject(propertyDescriptor.getContainingDeclaration()) || isPropertyWithBackingFieldInOuterClass(propertyDescriptor);
     }
 
     public static boolean isPropertyWithBackingFieldInOuterClass(@NotNull PropertyDescriptor propertyDescriptor) {
-        return isClassObjectWithBackingFieldsInOuter(propertyDescriptor.getContainingDeclaration());
+        return propertyDescriptor.getKind() != CallableMemberDescriptor.Kind.FAKE_OVERRIDE &&
+               isClassObjectWithBackingFieldsInOuter(propertyDescriptor.getContainingDeclaration());
     }
 
     public static int getVisibilityForSpecialPropertyBackingField(@NotNull PropertyDescriptor propertyDescriptor, boolean isDelegate) {

compiler/testData/codegen/box/staticFields/inheritedPropertyInClassObject.kt

@@ -0,0 +1,13 @@
+open class Bar<T>(val prop: String)
+class Foo {
+    class object : Bar<Foo>("OK") {
+        val p = Foo.prop
+        val p2 = prop
+        val p3 = this.prop
+    }
+
+    val p4 = Foo.prop
+    val p5 = prop
+}
+
+fun box(): String = Foo.prop

compiler/testData/codegen/box/staticFields/inheritedPropertyInObject.kt

@@ -0,0 +1,8 @@
+open class Bar<T>(val prop: String)
+object Foo : Bar<Foo>("OK") {
+
+    val p = Foo.prop
+    val p2 = prop
+    val p3 = this.prop
+}
+fun box(): String = Foo.prop

compiler/tests/org/jetbrains/jet/codegen/generated/BlackBoxCodegenTestGenerated.java

@@ -6241,6 +6241,18 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("inheritedPropertyInClassObject.kt")
+        public void testInheritedPropertyInClassObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/staticFields/inheritedPropertyInClassObject.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("inheritedPropertyInObject.kt")
+        public void testInheritedPropertyInObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/staticFields/inheritedPropertyInObject.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("syntheticAccessor.kt")
         public void testSyntheticAccessor() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/staticFields/syntheticAccessor.kt");