src/share/classes/com/sun/tools/javac/code/Symbol.java

@@ -778,11 +778,14 @@
             else
                 return fullname.toString();
         }
 
         public Name getQualifiedName() {
+            if (fullname != null)
             return fullname;
+            else  // Anonymous classes have an empty name.
+                return name.table.fromString("");
         }
 
         public Name flatName() {
             return flatname;
         }