From a878c7982c04b42bec9d4e26e5bfeb2102e8bc4f Mon Sep 17 00:00:00 2001
From: orbiter <mc@yacy.net>
Date: Tue, 25 Feb 2014 03:19:41 +0100
Subject: [PATCH] prevent npe

---
 source/net/yacy/crawler/CrawlStacker.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/net/yacy/crawler/CrawlStacker.java b/source/net/yacy/crawler/CrawlStacker.java
index 34e2b5ebe..5f69eeda0 100644
--- a/source/net/yacy/crawler/CrawlStacker.java
+++ b/source/net/yacy/crawler/CrawlStacker.java
@@ -405,7 +405,7 @@ public final class CrawlStacker {
                 // do double-check
                 if (dbocc == HarvestProcess.ERRORS) {
                     final CollectionConfiguration.FailDoc errorEntry = this.nextQueue.errorURL.get(urlhash);
-                    return "double in: errors (" + errorEntry.getFailReason() + ")";
+                    return "double in: errors (" + (errorEntry == null ? "NULL" : errorEntry.getFailReason()) + ")";
                 }
                 return "double in: " + dbocc.toString();
             }