JAL-1506 correct exit on close align frame

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

diff --git a/src/jalview/workers/ConservationThread.java b/src/jalview/workers/ConservationThread.java
index 7ed50d8..a7180a0 100644 (file)
--- a/src/jalview/workers/ConservationThread.java
+++ b/src/jalview/workers/ConservationThread.java
@@ -20,16 +20,16 @@
  */
 package jalview.workers;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import jalview.analysis.Conservation;
 import jalview.api.AlignCalcWorkerI;
-import jalview.api.AlignmentViewPanel;
 import jalview.api.AlignViewportI;
+import jalview.api.AlignmentViewPanel;
 import jalview.datamodel.AlignmentAnnotation;
 import jalview.datamodel.AlignmentI;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class ConservationThread extends AlignCalcWorker implements
         AlignCalcWorkerI
 {
@@ -74,6 +74,7 @@ public class ConservationThread extends AlignCalcWorker implements
       if (alignViewport.isClosed())
       {
         abortAndDestroy();
+        return;
       }
       List<AlignmentAnnotation> ourAnnot = new ArrayList<AlignmentAnnotation>();
       AlignmentI alignment = alignViewport.getAlignment();