Issue #23209, #23225: selectors.BaseSelector.get_key() now raises a
RuntimeError if the selector is closed. And selectors.BaseSelector.close() now
clears its internal reference to the selector mapping to break a reference
cycle. Initial patch written by Martin Richard.
diff --git a/Lib/selectors.py b/Lib/selectors.py
index 598845d4..6d569c3 100644
--- a/Lib/selectors.py
+++ b/Lib/selectors.py
@@ -174,6 +174,8 @@
SelectorKey for this file object
"""
mapping = self.get_map()
+ if mapping is None:
+ raise RuntimeError('Selector is closed')
try:
return mapping[fileobj]
except KeyError:
@@ -256,6 +258,7 @@
def close(self):
self._fd_to_key.clear()
+ self._map = None
def get_map(self):
return self._map