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gh-128552: fix refcycles in eager task creation (#128553)

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Thomas Grainger 2025-01-07 11:44:57 +00:00 • committed by GitHub
parent 6ea04da270
commit 61b9811ac6
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4 changed files with 71 additions and 6 deletions
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7
Lib/asyncio/taskgroups.py
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@ -205,7 +205,12 @@ class TaskGroup:
else:
self._tasks.add(task)
task.add_done_callback(self._on_task_done)
return task
try:
return task
finally:
# gh-128552: prevent a refcycle of
# task.exception().__traceback__->TaskGroup.create_task->task
del task
# Since Python 3.8 Tasks propagate all exceptions correctly,
# except for KeyboardInterrupt and SystemExit which are