From 63de5cd788f3ea4a30eb1e5037228d7abadc2871 Mon Sep 17 00:00:00 2001
From: jprocter <Jim Procter>
Date: Fri, 12 Jun 2009 15:49:54 +0000
Subject: [PATCH] nullpointer bugfix (possibly not needed - was an error in
 closing of alignment panels)

---
 src/jalview/gui/SequenceRenderer.java |    1 +
 1 file changed, 1 insertion(+)

diff --git a/src/jalview/gui/SequenceRenderer.java b/src/jalview/gui/SequenceRenderer.java
index c390041..1d49da8 100755
--- a/src/jalview/gui/SequenceRenderer.java
+++ b/src/jalview/gui/SequenceRenderer.java
@@ -181,6 +181,7 @@ public class SequenceRenderer
   public synchronized void drawBoxes(SequenceI seq, int start, int end,
           int y1)
   {
+    if (seq==null) return; // fix for racecondition
     int i = start;
     int length = seq.getLength();
 
-- 
1.7.10.2