Issue #23209: Break some reference cycles in asyncio. Patch written by Martin
Richard.
diff --git a/Lib/asyncio/base_subprocess.py b/Lib/asyncio/base_subprocess.py
index 81698b0..afc434d 100644
--- a/Lib/asyncio/base_subprocess.py
+++ b/Lib/asyncio/base_subprocess.py
@@ -182,6 +182,7 @@
def connection_lost(self, exc):
self.disconnected = True
self.proc._pipe_connection_lost(self.fd, exc)
+ self.proc = None
def pause_writing(self):
self.proc._protocol.pause_writing()
diff --git a/Lib/asyncio/futures.py b/Lib/asyncio/futures.py
index e0e12f0..19212a9 100644
--- a/Lib/asyncio/futures.py
+++ b/Lib/asyncio/futures.py
@@ -405,5 +405,5 @@
new_future.add_done_callback(_check_cancel_other)
fut.add_done_callback(
lambda future: loop.call_soon_threadsafe(
- new_future._copy_state, fut))
+ new_future._copy_state, future))
return new_future
diff --git a/Lib/selectors.py b/Lib/selectors.py
index e4ad4cb..b2f4c2b 100644
--- a/Lib/selectors.py
+++ b/Lib/selectors.py
@@ -256,6 +256,7 @@
def close(self):
self._fd_to_key.clear()
+ self._map = None
def get_map(self):
return self._map