From 41ed958ee6f0ff15836e11013d1cada8c3ae90fc Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Thu, 15 Jan 2015 13:16:50 +0100
Subject: Issue #23243: Fix asyncio._UnixWritePipeTransport.close()

Do nothing if the transport is already closed. Before it was not possible to
close the transport twice.
---
 Lib/asyncio/unix_events.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Lib/asyncio/unix_events.py')

diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index 14b48438ac9..9f4005cb13a 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -516,7 +516,7 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
             self._loop.call_soon(self._call_connection_lost, None)
 
     def close(self):
-        if not self._closing:
+        if self._pipe is not None and not self._closing:
             # write_eof is all what we needed to close the write pipe
             self.write_eof()
 
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