asyncio.subprocess: Fix a race condition in communicate()
Use self._loop instead of self._transport._loop, because transport._loop is set
to None at process exit.
diff --git a/Lib/asyncio/subprocess.py b/Lib/asyncio/subprocess.py
index c3b0175..414e023 100644
--- a/Lib/asyncio/subprocess.py
+++ b/Lib/asyncio/subprocess.py
@@ -146,7 +146,6 @@
@tasks.coroutine
def communicate(self, input=None):
- loop = self._transport._loop
if input:
stdin = self._feed_stdin(input)
else:
@@ -160,7 +159,7 @@
else:
stderr = self._noop()
stdin, stdout, stderr = yield from tasks.gather(stdin, stdout, stderr,
- loop=loop)
+ loop=self._loop)
yield from self.wait()
return (stdout, stderr)