From e23cf154453057f64c163af1dd82f2aad2f796b2 Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Mon, 29 Jul 2013 12:45:12 +0200
Subject: [PATCH] avoid NPE during trace (EA-47968)

---
 .../src/com/intellij/pom/tree/events/impl/TreeChangeImpl.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/platform/core-impl/src/com/intellij/pom/tree/events/impl/TreeChangeImpl.java b/platform/core-impl/src/com/intellij/pom/tree/events/impl/TreeChangeImpl.java
index e76757ab2f57..0bf3eed20209 100644
--- a/platform/core-impl/src/com/intellij/pom/tree/events/impl/TreeChangeImpl.java
+++ b/platform/core-impl/src/com/intellij/pom/tree/events/impl/TreeChangeImpl.java
@@ -508,7 +508,8 @@ public class TreeChangeImpl implements TreeChange {
       buffer.append("(");
       buffer.append(node.getElementType().toString());
       buffer.append(" at ").append(pair.getSecond()).append(", ");
-      buffer.append(getChangeByChild(node).toString());
+      ChangeInfo child = getChangeByChild(node);
+      buffer.append(child != null ? child.toString():"null");
       buffer.append(")");
       if(iterator.hasNext()) buffer.append(", ");
     }