Fix AL

flash/core/data/io/input_base.py

@@ -191,6 +191,14 @@ def __setstate__(self, newstate):
         newstate["data"] = None
         self.__dict__.update(newstate)
 
+    def __copy__(self):
+        """The default copy implementation seems to use ``__getstate__`` and ``__setstate__`` so we override it
+        here with a custom implementation to ensure that it includes the data list."""
+        cls = self.__class__
+        result = cls.__new__(cls)
+        result.__dict__.update(self.__dict__)
+        return result
+
     def __deepcopy__(self, memo):
         """The default deepcopy implementation seems to use ``__getstate__`` and ``__setstate__`` so we override it
         here with a custom implementation to ensure that it includes the data list."""