IDEA-89324 File structure: cannot find super class method definition when anonymous classes are shown

java/java-tests/testData/fileStructure/hierarchy/AnonymousHashCode.java

@@ -13,7 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-public class A<caret> {
+import java.lang.Object;
+
+public class A<caret> extends Object {
   void foo() {
     Object myObject = new Object(){};
   }

java/java-tests/testData/fileStructure/hierarchy/AnonymousHashCode.tree

@@ -1,6 +1,3 @@
--A.java
+-AnonymousHashCode.java
  -A
-  -[hashCode(): void]
-  -foo(): void
-   -$1
-    hashCode(): int
+  [hashCode(): int]

java/java-tests/testSrc/com/intellij/ide/fileStructure/JavaFileStructureHierarchyTest.java

@@ -33,5 +33,5 @@ public class JavaFileStructureHierarchyTest extends JavaFileStructureTestCase {
 
   public void testSimple() throws Exception {checkTree();}
   public void testAnonymousAsConstantInInterface() throws Exception {checkTree("getA");}
-  //public void testAnonymousHashCode() throws Exception {checkTree("hash");}
+  public void testAnonymousHashCode() throws Exception {checkTree("hash");}
 }

platform/platform-api/src/com/intellij/ui/treeStructure/filtered/FilteringTreeStructure.java

@@ -67,15 +67,17 @@ public class FilteringTreeStructure extends AbstractTreeStructure {
     } else {
       ArrayList<FilteringNode> nodes = new ArrayList<FilteringNode>(delegates.length);
       for (Object d : delegates) {
-        FilteringNode n = new FilteringNode(node, d);
         boolean isDuplicate = myDescriptors2Nodes.containsKey(d);
         if (!isDuplicate) {
+          FilteringNode n = new FilteringNode(node, d);
           myDescriptors2Nodes.put(d, n);
           nodes.add(n);
-          addToCache(n, isDuplicate);
         }
       }
       myNodesCache.put(node, nodes);
+      for (FilteringNode n : nodes) {
+        addToCache(n, false);
+      }
     }
   }