Labeled this & super to nested class' outer is an error

#KT-1174 In Progress

compiler/testData/diagnostics/tests/backingField/kt462BackingFieldsResolve.kt

@@ -109,7 +109,7 @@ class TestBackingFieldsVisibility() {
 
     val x = <!INACCESSIBLE_BACKING_FIELD!>$namespaceLevelVar<!>
 
-    class Inner() {
+    inner class Inner() {
         val z = this@TestBackingFieldsVisibility.$x
     }
 
@@ -169,4 +169,4 @@ class T() {
             }
         }
     }
-}
+}