mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

gh-116720: Fix corner cases of taskgroups (#117407)

Browse source 
This prevents external cancellations of a task group's parent task to
be dropped when an internal cancellation happens at the same time.
Also strengthen the semantics of uncancel() to clear self._must_cancel
when the cancellation count reaches zero.

Co-Authored-By: Tin Tvrtković <tinchester@gmail.com>
Co-Authored-By: Arthur Tacca
This commit is contained in:
Guido van Rossum 2024-04-09 08:17:28 -07:00 • committed by GitHub
parent 22b25d1eba
commit fa58e75a86
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
8 changed files with 183 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Lib/asyncio/tasks.py
View file

@ -255,6 +255,8 @@ class Task(futures._PyFuture): # Inherit Python Task implementation
"""
if self._num_cancels_requested > 0:
self._num_cancels_requested -= 1
if self._num_cancels_requested == 0:
self._must_cancel = False
return self._num_cancels_requested
def __eager_start(self):