Update objects.py

added explicit copy behaviour to work around possible memory leak in duplicate. This may not fix it..so please test (but I haven't been able to break it since adding this code)

nodes/basic_data/objects.py

@@ -159,7 +159,12 @@ def draw_buttons(self, context, layout):
 
     def update(self):
         pass
-
+
+    def copy(self, node):
+        if self.objects_local:
+            name = self.name + self.id_data.name
+            handle_write(name, literal_eval(self.objects_local))
+
     def process(self):
         name = self.name + self.id_data.name
         handle = handle_read(name)