From b81d17a7e2c29b3e3557897e6dacaee8f7810e82 Mon Sep 17 00:00:00 2001
From: Alexey Kudravtsev <cdr@intellij.com>
Date: Mon, 30 Aug 2010 11:21:05 +0400
Subject: [PATCH] AOOB

---
 .../src/com/intellij/find/actions/ShowUsagesAction.java         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java b/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
index e03ad8f52766..1bfc71009002 100644
--- a/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
+++ b/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
@@ -528,7 +528,7 @@ public class ShowUsagesAction extends AnAction {
       }
 
       public int getColumnCount() {
-        return data.get(0) instanceof UsageNode ? 3 : 1;
+        return !data.isEmpty() && data.get(0) instanceof UsageNode ? 3 : 1;
       }
 
       public Object getValueAt(int rowIndex, int columnIndex) {