JAL-2426 Checks on conservation thread in case we are shutting down

[jalview.git] / src / jalview / workers / ConservationThread.java

diff --git a/src/jalview/workers/ConservationThread.java b/src/jalview/workers/ConservationThread.java
index 24cfb08..b2a67b7 100644 (file)
--- a/src/jalview/workers/ConservationThread.java
+++ b/src/jalview/workers/ConservationThread.java
@@ -1,6 +1,6 @@
 /*
- * Jalview - A Sequence Alignment Editor and Viewer (Version 2.9.0b2)
- * Copyright (C) 2015 The Jalview Authors
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
  * 
  * This file is part of Jalview.
  * 
@@ -55,7 +55,7 @@ public class ConservationThread extends AlignCalcWorker
     {
       calcMan.notifyStart(this); // updatingConservation = true;
 
-      while (!calcMan.notifyWorking(this))
+      while ((calcMan != null) && (!calcMan.notifyWorking(this)))
       {
         try
         {
@@ -69,7 +69,8 @@ public class ConservationThread extends AlignCalcWorker
           ex.printStackTrace();
         }
       }
-      if (alignViewport.isClosed())
+      if ((alignViewport == null) || (calcMan == null)
+              || (alignViewport.isClosed()))
       {
         abortAndDestroy();
         return;
@@ -94,7 +95,7 @@ public class ConservationThread extends AlignCalcWorker
       }
       try
       {
-        cons = Conservation.calculateConservation("All", 3,
+        cons = Conservation.calculateConservation("All",
                 alignment.getSequences(), 0, alWidth - 1, false,
                 ConsPercGaps, quality != null);
       } catch (IndexOutOfBoundsException x)