asyncio: Fix _ProactorWritePipeTransport._pipe_closed()
The "exc" variable was not defined, pass a BrokenPipeError exception instead.
diff --git a/Lib/asyncio/proactor_events.py b/Lib/asyncio/proactor_events.py
index f45cd9c..d99e8ce 100644
--- a/Lib/asyncio/proactor_events.py
+++ b/Lib/asyncio/proactor_events.py
@@ -275,7 +275,7 @@
assert fut is self._read_fut, (fut, self._read_fut)
self._read_fut = None
if self._write_fut is not None:
- self._force_close(exc)
+ self._force_close(BrokenPipeError())
else:
self.close()