From f3dc6d77e92f77eed4f90e77f380472d952d64ff Mon Sep 17 00:00:00 2001
From: Konstantin Bulenkov <kb@jetbrains.com>
Date: Mon, 6 Feb 2012 15:21:55 +0100
Subject: [PATCH] NPE fix

---
 .../com/intellij/ide/util/treeView/AbstractTreeUi.java    | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java b/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java
index 2e21403db49b..b892cd36e489 100644
--- a/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java
+++ b/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java
@@ -4811,9 +4811,13 @@ public class AbstractTreeUi {
 
   public boolean isInStructure(@Nullable Object element) {
     Object eachParent = element;
+    final AbstractTreeStructure structure = getTreeStructure();
+
+    if (structure == null) return false;
+
     while (eachParent != null) {
-      if (getTreeStructure().getRootElement().equals(eachParent)) return true;
-      eachParent = getTreeStructure().getParentElement(eachParent);
+      if (Comparing.equal(structure.getRootElement(), eachParent)) return true;
+      eachParent = structure.getParentElement(eachParent);
     }
 
     return false;