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| author | Thomas Grainger <tagrain@gmail.com> | 2025-01-07 11:44:57 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-01-07 11:44:57 +0000 |
| commit | 61b9811ac6843e22b5896ef96030d421b79cd892 (patch) | |
| tree | 3f29fef0b3d767a290bd51c4b1429fb581af3885 /Lib/asyncio/taskgroups.py | |
| parent | 6ea04da27036eaa69d65150148bb8c537d9beacf (diff) | |
| download | cpython-61b9811ac6843e22b5896ef96030d421b79cd892.tar.gz cpython-61b9811ac6843e22b5896ef96030d421b79cd892.zip | |
gh-128552: fix refcycles in eager task creation (#128553)
Diffstat (limited to 'Lib/asyncio/taskgroups.py')
| -rw-r--r-- | Lib/asyncio/taskgroups.py | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Lib/asyncio/taskgroups.py b/Lib/asyncio/taskgroups.py index 9fa772ca9d0..8af199d6dcc 100644 --- a/Lib/asyncio/taskgroups.py +++ b/Lib/asyncio/taskgroups.py @@ -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 |