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GH-85760: Fix race in calling process_exited callback too early (GH-97009)

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(cherry picked from commit 282edd7b2a)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
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Miss Islington (bot) 2022-09-22 10:23:48 -07:00 • committed by GitHub
parent 646aa7efb3
commit 43d8860aa2
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2 changed files with 3 additions and 1 deletions
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3
Lib/asyncio/unix_events.py
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@ -223,7 +223,8 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
return transp return transp
def _child_watcher_callback(self, pid, returncode, transp): def _child_watcher_callback(self, pid, returncode, transp):
self.call_soon_threadsafe(transp._process_exited, returncode) # Skip one iteration for callbacks to be executed
self.call_soon_threadsafe(self.call_soon, transp._process_exited, returncode)
async def create_unix_connection( async def create_unix_connection(
self, protocol_factory, path=None, *, self, protocol_factory, path=None, *,

1
Misc/NEWS.d/next/Library/2022-09-22-11-50-29.gh-issue-85760.DETTPd.rst Normal file
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@ -0,0 +1 @@
Fix race condition in :mod:`asyncio` where :meth:`~asyncio.SubprocessProtocol.process_exited` called before the :meth:`~asyncio.SubprocessProtocol.pipe_data_received` leading to inconsistent output. Patch by Kumar Aditya.