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gh-108973: Fix asyncio test_subprocess_consistent_callbacks() (#109431)

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SubprocessProtocol process_exited() method can be called before
pipe_data_received() and pipe_connection_lost() methods. Document it
and adapt the test for that.

Revert commit 282edd7b2a.
_child_watcher_callback() calls immediately _process_exited(): don't
add an additional delay with call_soon(). The reverted change didn't
make _process_exited() more determistic: it can still be called
before pipe_connection_lost() for example.

Co-authored-by: Davide Rizzo <sorcio@gmail.com>
This commit is contained in:
Victor Stinner 2023-09-20 15:54:19 +02:00 • committed by GitHub
parent 850cc8d0b1
commit ced6924630
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4 changed files with 67 additions and 19 deletions
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Lib/asyncio/unix_events.py
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@ -226,8 +226,7 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
return transp
def _child_watcher_callback(self, pid, returncode, transp):
# Skip one iteration for callbacks to be executed
self.call_soon_threadsafe(self.call_soon, transp._process_exited, returncode)
self.call_soon_threadsafe(transp._process_exited, returncode)
async def create_unix_connection(
self, protocol_factory, path=None, *,