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-rw-r--r--Lib/asyncio/unix_events.py2
-rw-r--r--Lib/test/test_asyncio/test_unix_events.py3
2 files changed, 4 insertions, 1 deletions
diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index 14b4843..9f4005c 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()
diff --git a/Lib/test/test_asyncio/test_unix_events.py b/Lib/test/test_asyncio/test_unix_events.py
index 5f4b024..4a68ce3 100644
--- a/Lib/test/test_asyncio/test_unix_events.py
+++ b/Lib/test/test_asyncio/test_unix_events.py
@@ -766,6 +766,9 @@ class UnixWritePipeTransportTests(test_utils.TestCase):
tr.close()
tr.write_eof.assert_called_with()
+ # closing the transport twice must not fail
+ tr.close()
+
def test_close_closing(self):
tr = unix_events._UnixWritePipeTransport(
self.loop, self.pipe, self.protocol)