JAL-2046 stack trace for implementation warning

diff --git a/src/jalview/datamodel/Sequence.java b/src/jalview/datamodel/Sequence.java
index a857712..88f4308 100755 (executable)
--- a/src/jalview/datamodel/Sequence.java
+++ b/src/jalview/datamodel/Sequence.java
@@ -307,8 +307,9 @@ public class Sequence extends ASequence implements SequenceI
               && datasetSequence.getSequenceFeatures() != null
               && datasetSequence.getSequenceFeatures().length > 0)
       {
-        System.err
-              .println("Warning: JAL-2046 side effect ? Possible implementation error: overwriting dataset sequence features by setting sequence features on alignment");
+        new Exception(
+                "Warning: JAL-2046 side effect ? Possible implementation error: overwriting dataset sequence features by setting sequence features on alignment")
+                .printStackTrace();
       }
       datasetSequence.setSequenceFeatures(features);
     }