asyncio: Fix _ProactorBasePipeTransport.close()
Set the _read_fut attribute to None after cancelling it.
This change should fix a race condition with
_ProactorWritePipeTransport._pipe_closed().
diff --git a/Lib/asyncio/proactor_events.py b/Lib/asyncio/proactor_events.py
index a177d32..6d8641f 100644
--- a/Lib/asyncio/proactor_events.py
+++ b/Lib/asyncio/proactor_events.py
@@ -72,6 +72,7 @@
self._loop.call_soon(self._call_connection_lost, None)
if self._read_fut is not None:
self._read_fut.cancel()
+ self._read_fut = None
def _fatal_error(self, exc, message='Fatal error on pipe transport'):
if isinstance(exc, (BrokenPipeError, ConnectionResetError)):
@@ -93,9 +94,10 @@
self._conn_lost += 1
if self._write_fut:
self._write_fut.cancel()
+ self._write_fut = None
if self._read_fut:
self._read_fut.cancel()
- self._write_fut = self._read_fut = None
+ self._read_fut = None
self._pending_write = 0
self._buffer = None
self._loop.call_soon(self._call_connection_lost, exc)