From 110797a22ece175cb4f9b3857b3208aac4281fcd Mon Sep 17 00:00:00 2001
From: Sven Jacob <holobender@users.sourceforge.net>
Date: Thu, 16 Nov 2006 22:27:25 +0000
Subject: [PATCH] Fixed 1597987: NPE in new DaaRule

git-svn-id: https://pmd.svn.sourceforge.net/svnroot/pmd/trunk@4805 51baf565-9d33-0410-a72c-fc3788e3496d
---
 .../pmd/dfa/pathfinder/DAAPathFinder.java          | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/pmd/src/net/sourceforge/pmd/dfa/pathfinder/DAAPathFinder.java b/pmd/src/net/sourceforge/pmd/dfa/pathfinder/DAAPathFinder.java
index 2eda85eb18..97ac6c22c7 100644
--- a/pmd/src/net/sourceforge/pmd/dfa/pathfinder/DAAPathFinder.java
+++ b/pmd/src/net/sourceforge/pmd/dfa/pathfinder/DAAPathFinder.java
@@ -290,12 +290,14 @@ public class DAAPathFinder {
     private int countLoops() {
         DefaultMutableTreeNode treeNode = stack.getLastLeaf();
         int counter = 0;
-        int childCount = treeNode.getParent().getChildCount();
-        for (int i = 0; i < childCount; i++) {
-            DefaultMutableTreeNode tNode = (DefaultMutableTreeNode) treeNode.getParent().getChildAt(i);
-            PathElement e = (PathElement) tNode.getUserObject();
-            if (e != null && !e.isPseudoPathElement()) {
-                counter++;
+        if (treeNode.getParent() != null) {
+            int childCount = treeNode.getParent().getChildCount();
+            for (int i = 0; i < childCount; i++) {
+                DefaultMutableTreeNode tNode = (DefaultMutableTreeNode) treeNode.getParent().getChildAt(i);
+                PathElement e = (PathElement) tNode.getUserObject();
+                if (e != null && !e.isPseudoPathElement()) {
+                    counter++;
+                }
             }
         }
         return counter;