738c738
<         if self.stream:
---
>         if self.stream and hasattr(self.stream, 'flush'):
792,793c792,795
<         if self.stream:
<             self.flush()
---
>         if not self.stream:
>             return
>         self.flush()
>         if hasattr(self.stream, 'close'):
795,796c797,798
<             StreamHandler.close(self)
<             self.stream = None
---
>         StreamHandler.close(self)
>         self.stream = None