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JAL-1152 avoid NPE on null alignment annotation vector
[jalview.git] / src / jalview / gui / PopupMenu.java
diff --git a/src/jalview/gui/PopupMenu.java b/src/jalview/gui/PopupMenu.java
index 36811c7..8467c66 100644 (file)
--- a/src/jalview/gui/PopupMenu.java
+++ b/src/jalview/gui/PopupMenu.java
@@ -372,7 +372,7 @@ public class PopupMenu extends JPopupMenu
       {
         AlignmentAnnotation[] aa = ap.av.getAlignment()
                 .getAlignmentAnnotation();
-        for (int i = 0; i < aa.length; i++)
+        for (int i = 0; aa != null && i < aa.length; i++)
         {
           if (aa[i].isValidStruc() && aa[i].sequenceRef == null)
           {