commit 54b74fe9df89f0e5646736f1f60376b4e37c422c
author Andrew Svetlov <andrew.svetlov@gmail.com> Wed May 15 00:39:13 2019 +0300
committer GitHub <noreply@github.com> Wed May 15 00:39:13 2019 +0300
tree 66a644b3c82f9b967c0e87192aca06979ef31b46
parent 91c99873d115b9796377d5056785f2abc987520f

bpo-36801: Temporarily fix regression in writer.drain() (#13330)

Lib/asyncio/streams.py

diff --git a/Lib/asyncio/streams.py b/Lib/asyncio/streams.py
index 146a338..2f0cbfd 100644
--- a/Lib/asyncio/streams.py
+++ b/Lib/asyncio/streams.py
@@ -439,9 +439,7 @@
             # Wait for protocol.connection_lost() call
             # Raise connection closing error if any,
             # ConnectionResetError otherwise
-            fut = self._protocol._get_close_waiter(self)
-            await fut
-            raise ConnectionResetError('Connection lost')
+            await sleep(0)
         await self._protocol._drain_helper()