Index: trunk/src/org/openstreetmap/josm/gui/io/UploadPrimitivesTask.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/io/UploadPrimitivesTask.java	(revision 9983)
+++ trunk/src/org/openstreetmap/josm/gui/io/UploadPrimitivesTask.java	(revision 9986)
@@ -262,5 +262,7 @@
                     recoverFromGoneOnServer(e, getProgressMonitor());
                 } catch (ChangesetClosedException e) {
-                    processedPrimitives.addAll(writer.getProcessedPrimitives()); // OsmPrimitive in => OsmPrimitive out
+                    if (writer != null) {
+                        processedPrimitives.addAll(writer.getProcessedPrimitives()); // OsmPrimitive in => OsmPrimitive out
+                    }
                     changeset.setOpen(false);
                     switch(e.getSource()) {