no enclosing instance error for top level classes (IDEA-169088)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/EnclosingRefInTopLevelClassExtendingInnerWhichExtendsItsOuter.java

@@ -0,0 +1,5 @@
+class Outer {
+  class Inner extends Outer {}
+}
+
+class Impl extends <error descr="No enclosing instance of type 'Outer' is in scope">Outer.Inner</error> {}